Why i getting Internal server error in my jquery service call
<p>I used simple jquery service call i always getting Internal server error why? please help me. i given my code.<strong>I using VS2005</strong></p>

<p>Give me details </p>

<p><strong>Default.aspx</strong></p>

<pre><code>&lt;pre&gt;&lt;code&gt;  
&lt;script src="Scripts/jquery-1.3.2.js" type="text/javascript"&gt;&lt;/script&gt;
&lt;script type="text/javascript"&gt;

    function CallService() {
    $('input[type=button]').attr('disabled', true);
        $("#CustDetails").html('');
        $("#CustDetails").addClass("loading");
        $.ajax({
            type: "POST",
            url: "AdvService.asmx/GetCtcDetails",
             data: '{}',
            contentType: "application/json; charset=utf-8",
            dataType: "json",            

            success: OnSuccess,
            error: OnError
        });

        function OnSuccess(data, status) {
            $("#CustDetails").removeClass("loading");
            $("#CustDetails").html(data.d);
            $('input[type=button]').attr('disabled', false);
        }

        function OnError(request, status, error) {
            $("#CustDetails").removeClass("loading");
            $("#CustDetails").html(request.statusText);
            $('input[type=button]').attr('disabled', false);
        }
    }
&lt;/script&gt;
</code></pre>

<p>Body </p>

<pre><code>&lt;pre&gt;&lt;code&gt;

&lt;form id="DocForm" runat="server"&gt;
&lt;div&gt;

    &lt;table style="width:31%;"&gt;
        &lt;tr&gt;
            &lt;td&gt;
                Enter Contact ID&lt;/td&gt;
            &lt;td&gt;
                :&lt;/td&gt;
            &lt;td&gt;
                &lt;input id="txt_id" type="text" /&gt;
                &lt;input id="btnGo" type="button" value="Get Details" onclick ="CallService(); return false;"/&gt;&lt;/td&gt;
        &lt;/tr&gt;
        &lt;/table&gt;
&lt;br /&gt;
&lt;div id="CustDetails" style="width: 60%; height: 75px;"&gt;
&amp;nbsp;
   &lt;/div&gt;
&lt;/div&gt;
&lt;/form&gt;
</code></pre>

<p>
</p>

<p> </p>

<pre><code>enter code here
[WebMethod]
public string DisplayMessage()
{
    return "Hello World using jQuery Ajax";
}
</code></pre>

<p></p>

<p>I used simple jquery service call i always getting Internal server error why? please help me. i given my code.<strong>I using VS2005</strong></p>

<p>Give me details </p>
