Issue with makeWebRequest

*building a app for gps66st so the memory requirement are different i suppose*

I'm trying to load a pdf but only receive a portion (1569 byte for the body instead of 2millions)

Is there something I'm doing wrong ?

function onReceive(responseCode, data) {
    	if (responseCode == 200) {
           	System.println("Request Successful ");
           	System.println(data.length());
       	}
       	else {
           	System.println("Response: " + responseCode);            // print response code
       	}
   	}
   	
	function makeRequest() {
		var url = "https://s3.amazonaws.com/imagescloud/documents/tirages/cartes/ANT_Cerf_Secteur_chicotte-vtt.pdf";                         // set the url
	   	var options = {                                             // set the options
	       :method => Communications.HTTP_REQUEST_METHOD_GET,      // set HTTP method
	       :headers => {                                           // set headers
	               "Accept" => "*/*",
	               "Host" => "s3.amazonaws.com"
	               },	                                                               // set response type
	       :responseType => Communications.HTTP_RESPONSE_CONTENT_TYPE_TEXT_PLAIN
	   	};
	
	   	var responseCallback = method(:onReceive);                  // set responseCallback to
	                                                               // onReceive() method
	   	// Make the Communications.makeWebRequest() call
   		Communications.makeWebRequest(url, null, options, method(:onReceive));
  	}