Error: jQuery171044046986018069634_1344411426301 was not called - while doing ajax call

Error: jQuery171044046986018069634_1344411426301 was not called - while doing ajax call

Hi,

I am using the following ajax call to perform login,


$( "#loginform" ).validVal();
   
    $( "#loginform" ).submit(function( event ) {
        event.preventDefault();
        var form_data = $( "#loginform" ).triggerHandler( "submitForm" );
        if ( form_data ) {
            $.ajax({
               
                type: "POST",
                url: serviceURL+'login.php?',
                data: form_data,
                dataType: 'jsonp',
                async: false,
                success: function( data ) {
                   
                    var doc = eval(data) ;
                   
                    window.localStorage.setItem("docname", doc[0].dispname);
                    sessionStorage.setItem("sesuserid",doc[0].recno);
                   
                    window.location.href="index.html?login=true" ;
               },
               error : function(jqXHR, textStatus, errorThrown){
                alert('status='+jqXHR.status) ;
                alert('error='+errorThrown) ;
                   
               },
                complete : function(jqXHR, textStatus){
                 $.mobile.hidePageLoadingMsg() ;
                }
               
            });           
        }
    });

But i am getting the following errors,


status=200    and    
Error: jQuery171044046986018069634_1344411426301 was not called

Before it was working good and i was using it with localhost and the actual site. suddenly  the problem arised.
How this can be solved.

Please help me.