diff --git a/README.md b/README.md
index 321c7b6..cacb8d6 100644
--- a/README.md
+++ b/README.md
@@ -78,12 +78,12 @@ true : uploading it each request
 
 ```php
 $to="put_your_mobile_number_here"; 
-$caption="image Caption"; 
 $image="https://file-example.s3-accelerate.amazonaws.com/images/test.jpg"; 
+$caption="image Caption"; 
 $priority=10;
 $referenceId="SDK"
 $nocache=false; 
-$api=$client->sendImageMessage($to,$caption,$image,$priority,$referenceId,$nocache);
+$api=$client->sendImageMessage($to,$image,$caption,$priority,$referenceId,$nocache);
 print_r($api);
 ```
 ## Send Document 
@@ -144,9 +144,9 @@ Max Base64 length : 2,000,000
 
 ```php 
 $to="put_your_mobile_number_here"; 
+$video="https://file-example.s3-accelerate.amazonaws.com/video/test.mp4";
 $caption="video Caption"; 
-$video="https://file-example.s3-accelerate.amazonaws.com/video/test.mp4"; 
-$api=$client->sendVideoMessage($to,$caption,$video);
+$api=$client->sendVideoMessage($to,$video,$caption);
 print_r($api);
 ```
 ## Send Link 
diff --git a/composer.json b/composer.json
index 27b7aa9..1acdb28 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
             "url": "https://github.com/ultramsg/whatsapp-php-sdk"
         }
     ],
-    "version": "2.0.6",
+    "version": "2.0.7",
     "license": "MIT",
     "authors": [
         {
diff --git a/ultramsg.class.php b/ultramsg.class.php
index 243f33f..bfc1347 100644
--- a/ultramsg.class.php
+++ b/ultramsg.class.php
@@ -16,11 +16,9 @@ class WhatsAppApi {
 			* @param $instance_id
 		*/
         public function __construct($token, $instance_id){
-            $this->token = $token;
-            $this->instance_id = $instance_id;
-			if(ctype_digit($instance_id)){
-				$this->instance_id = "instance".$instance_id;
-			}  
+            $this->token = $token; 
+			$this->instance_id = "instance".preg_replace('/[^0-9]/', '',$instance_id);
+			
 		}
 		
 		// messages
@@ -38,7 +36,7 @@ public function sendChatMessage($to,$body,$priority=10,$referenceId=""){
 			return $this->sendRequest("POST","messages/chat",$params );
 		}
 		
-		public function sendImageMessage($to,$caption="",$image,$priority=10,$referenceId="",$nocache=false){
+		public function sendImageMessage($to,$image,$caption="",$priority=10,$referenceId="",$nocache=false){
 			$params =array("to"=>$to,"caption"=>$caption,"image"=>$image,"priority"=>$priority,"referenceId"=>$referenceId,"nocache"=>$nocache);
 			return $this->sendRequest("POST","messages/image",$params );
 		}
@@ -58,7 +56,7 @@ public function sendVoiceMessage($to,$audio,$priority=10,$referenceId="",$nocach
 			return $this->sendRequest("POST","messages/voice",$params );
 		}
 		
-		public function sendVideoMessage($to,$caption="",$video,$priority=10,$referenceId="",$nocache=false){
+		public function sendVideoMessage($to,$video,$caption="",$priority=10,$referenceId="",$nocache=false){
 			$params =array("to"=>$to,"caption"=>$caption,"video"=>$video,"priority"=>$priority,"referenceId"=>$referenceId,"nocache"=>$nocache);
 			return $this->sendRequest("POST","messages/video",$params );
 		}
@@ -73,151 +71,151 @@ public function sendContactMessage($to,$contact,$priority=10,$referenceId=""){
 			return $this->sendRequest("POST","messages/contact",$params );
 		}
 		public function sendLocationMessage($to,$address,$lat,$lng,$priority=10,$referenceId=""){
-			$params =array("to"=>$to,"address"=>$address,"lat"=>$lat,"lng"=>$lng,"priority"=>$priority,"referenceId"=>$referenceId);
-			return $this->sendRequest("POST","messages/location",$params );
+		$params =array("to"=>$to,"address"=>$address,"lat"=>$lat,"lng"=>$lng,"priority"=>$priority,"referenceId"=>$referenceId);
+		return $this->sendRequest("POST","messages/location",$params );
 		}
 		public function sendVcardMessage($to,$vcard,$priority=10,$referenceId=""){
-			$params =array("to"=>$to,"vcard"=>$vcard,"priority"=>$priority,"referenceId"=>$referenceId);
-			return $this->sendRequest("POST","messages/vcard",$params );
+		$params =array("to"=>$to,"vcard"=>$vcard,"priority"=>$priority,"referenceId"=>$referenceId);
+		return $this->sendRequest("POST","messages/vcard",$params );
 		}
 		public function sendClearMessage($status){
-			$params =array("status"=>$status);
-			return $this->sendRequest("POST","messages/clear",$params );
+		$params =array("status"=>$status);
+		return $this->sendRequest("POST","messages/clear",$params );
 		}
 		public function resendByStatus($status){
-			$params =array("status"=>$status);
-			return $this->sendRequest("POST","messages/resendByStatus",$params );
+		$params =array("status"=>$status);
+		return $this->sendRequest("POST","messages/resendByStatus",$params );
 		}
 		
 		public function resendById($id){
-			$params =array("id"=>$id);
-			return $this->sendRequest("POST","messages/resendById",$params );
+		$params =array("id"=>$id);
+		return $this->sendRequest("POST","messages/resendById",$params );
 		}
 		
 		// instance
 		
 		public function getInstanceStatus(){
-			return $this->sendRequest("GET","instance/status");
+		return $this->sendRequest("GET","instance/status");
 		}
 		
 		public function getInstanceQr(){
-			return $this->sendRequest("GET","instance/qr");
+		return $this->sendRequest("GET","instance/qr");
 		}
 		
 		public function getInstanceQrCode(){
-			return $this->sendRequest("GET","instance/qrCode");
+		return $this->sendRequest("GET","instance/qrCode");
 		}
 		
 		public function getInstanceScreenshot($encoding=""){
-			return $this->sendRequest("GET","instance/screenshot",array("encoding"=>$encoding));
+		return $this->sendRequest("GET","instance/screenshot",array("encoding"=>$encoding));
 		}
 		
 		public function getInstanceMe(){
-			return $this->sendRequest("GET","instance/me");
+		return $this->sendRequest("GET","instance/me");
 		}
 		
 		public function getInstanceSettings(){
-			return $this->sendRequest("GET","instance/settings");
+		return $this->sendRequest("GET","instance/settings");
 		}
-	
-	public function sendInstanceTakeover(){
-	return $this->sendRequest("POST","instance/takeover" );
-	}
-	
-	public function sendInstanceLogout(){
-	return $this->sendRequest("POST","instance/logout" );
-	}
-	
-	public function sendInstanceRestart(){
-	return $this->sendRequest("POST","instance/restart" );
-	}
-	
-	public function sendInstanceSettings($sendDelay="1",$webhook_url="",$webhook_message_received=false,$webhook_message_create=false,$webhook_message_ack=false,$webhook_message_download_media=false){
-	$params =array("sendDelay"=>$sendDelay,"webhook_url"=>$webhook_url,"webhook_message_received"=>json_encode($webhook_message_received),"webhook_message_create"=>json_encode($webhook_message_create),"webhook_message_ack"=>json_encode($webhook_message_ack),"webhook_message_download_media"=>json_encode($webhook_message_download_media));
-	return $this->sendRequest("POST","instance/settings",$params);
-	}
-	
-	public function sendInstanceClear(){
-	return $this->sendRequest("POST","instance/clear" );
-	}
-	
-	// Chats
-	
-	public function getChats(){
-	return $this->sendRequest("GET","chats");
-	}
-	
-	public function getChatsMessages($chatId,$limit=100){
-	$params =array("chatId"=>$chatId,"limit"=>$limit);
-	return $this->sendRequest("GET","chats/messages",$params);
-	}
-	
-	// Contacts
-	
-	public function getContacts(){
-	return $this->sendRequest("GET","contacts");
-	}
-	
-	public function getContact($chatId){
-	$params =array("chatId"=>$chatId);
-	return $this->sendRequest("GET","contacts/contact",$params);
-	}
-	
-	public function getBlockedContacts(){
-	return $this->sendRequest("GET","contacts/blocked");
-	}
-	
-	public function checkContact($chatId){
-	$params =array("chatId"=>$chatId);
-	return $this->sendRequest("GET","contacts/check",$params);
-	}
-	
-	public function blockContact($chatId){
-	$params =array("chatId"=>$chatId);
-	return $this->sendRequest("POST","contacts/block",$params);
-	}
-	
-	public function unblockContact($chatId){
-	$params =array("chatId"=>$chatId);
-	return $this->sendRequest("POST","contacts/unblock",$params);
-	}
-	
-	public function sendRequest($method,$path,$params=array()){
-	
-	if(!is_callable('curl_init')){
-	return array("Error"=>"cURL extension is disabled on your server");
-	}
-	$url="https://api.ultramsg.com/".$this->instance_id."/".$path;
-	$params['token'] = $this->token;
-	$data=http_build_query($params);
-	if(strtolower($method)=="get")$url = $url . '?' . $data;
-	$curl = curl_init($url);
-	if(strtolower($method)=="post"){
-	curl_setopt($curl, CURLOPT_POST, true);
-	curl_setopt($curl, CURLOPT_POSTFIELDS,$data);
-	}	 
-	curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 0);
-	curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0);
-	curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
-	curl_setopt($curl, CURLOPT_HEADER, 1);
-	$response = curl_exec($curl);
-	$httpCode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
-	if($httpCode == 404) {
-	return array("Error"=>"instance not found or pending please check you instance id");
-	}
-	$contentType = curl_getinfo($curl, CURLINFO_CONTENT_TYPE);
-	$header_size = curl_getinfo($curl, CURLINFO_HEADER_SIZE);
-	$header = substr($response, 0, $header_size);
-	$body = substr($response, $header_size);
-	curl_close($curl);
-	
-	if (strpos($contentType,'application/json') !== false) {
-	return json_decode($body,true);
-	}
-	return $body;
-	}
-	
-	
-	
-	
-	}																																																							
\ No newline at end of file
+		
+		public function sendInstanceTakeover(){
+		return $this->sendRequest("POST","instance/takeover" );
+		}
+		
+		public function sendInstanceLogout(){
+		return $this->sendRequest("POST","instance/logout" );
+		}
+		
+		public function sendInstanceRestart(){
+		return $this->sendRequest("POST","instance/restart" );
+		}
+		
+		public function sendInstanceSettings($sendDelay="1",$webhook_url="",$webhook_message_received=false,$webhook_message_create=false,$webhook_message_ack=false,$webhook_message_download_media=false){
+		$params =array("sendDelay"=>$sendDelay,"webhook_url"=>$webhook_url,"webhook_message_received"=>json_encode($webhook_message_received),"webhook_message_create"=>json_encode($webhook_message_create),"webhook_message_ack"=>json_encode($webhook_message_ack),"webhook_message_download_media"=>json_encode($webhook_message_download_media));
+		return $this->sendRequest("POST","instance/settings",$params);
+		}
+		
+		public function sendInstanceClear(){
+		return $this->sendRequest("POST","instance/clear" );
+		}
+		
+		// Chats
+		
+		public function getChats(){
+		return $this->sendRequest("GET","chats");
+		}
+		
+		public function getChatsMessages($chatId,$limit=100){
+		$params =array("chatId"=>$chatId,"limit"=>$limit);
+		return $this->sendRequest("GET","chats/messages",$params);
+		}
+		
+		// Contacts
+		
+		public function getContacts(){
+		return $this->sendRequest("GET","contacts");
+		}
+		
+		public function getContact($chatId){
+		$params =array("chatId"=>$chatId);
+		return $this->sendRequest("GET","contacts/contact",$params);
+		}
+		
+		public function getBlockedContacts(){
+		return $this->sendRequest("GET","contacts/blocked");
+		}
+		
+		public function checkContact($chatId){
+		$params =array("chatId"=>$chatId);
+		return $this->sendRequest("GET","contacts/check",$params);
+		}
+		
+		public function blockContact($chatId){
+		$params =array("chatId"=>$chatId);
+		return $this->sendRequest("POST","contacts/block",$params);
+		}
+		
+		public function unblockContact($chatId){
+		$params =array("chatId"=>$chatId);
+		return $this->sendRequest("POST","contacts/unblock",$params);
+		}
+		
+		public function sendRequest($method,$path,$params=array()){
+		
+		if(!is_callable('curl_init')){
+		return array("Error"=>"cURL extension is disabled on your server");
+		}
+		$url="https://api.ultramsg.com/".$this->instance_id."/".$path;
+		$params['token'] = $this->token;
+		$data=http_build_query($params);
+		if(strtolower($method)=="get")$url = $url . '?' . $data;
+		$curl = curl_init($url);
+		if(strtolower($method)=="post"){
+		curl_setopt($curl, CURLOPT_POST, true);
+		curl_setopt($curl, CURLOPT_POSTFIELDS,$data);
+		}	 
+		curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 0);
+		curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0);
+		curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
+		curl_setopt($curl, CURLOPT_HEADER, 1);
+		$response = curl_exec($curl);
+		$httpCode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
+		if($httpCode == 404) {
+		return array("Error"=>"instance not found or pending please check you instance id");
+		}
+		$contentType = curl_getinfo($curl, CURLINFO_CONTENT_TYPE);
+		$header_size = curl_getinfo($curl, CURLINFO_HEADER_SIZE);
+		$header = substr($response, 0, $header_size);
+		$body = substr($response, $header_size);
+		curl_close($curl);
+		
+		if (strpos($contentType,'application/json') !== false) {
+		return json_decode($body,true);
+		}
+		return $body;
+		}
+		
+		
+		
+		
+		}																																																													
\ No newline at end of file