ACS create Status

now i am trying to create Status through ASC reset API and every time it give me this error

message failed to authenticate user appcelerator acs reset api

http = Ti.Network.createHTTPClient({
            onload : function() {
                alert('status' + " " +this.responseText);
            },
            onerror : function() {
                alert('Error');
            },
            timeout : 500
        });
        http.open('POST','https://api.cloud.appcelerator.com/v1/statuses/create.json?key=xxxxxxxxxxxxx');
        http.send({
            session_id : xxxxxx,
            message : message,
            photo : photo,
        });