Cross domain web service call using jquery, web service is hosted on iis6.0

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ASP.NET

Javascript

Ajax

jQuery

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Hi,

Scenario is:
a) webservice(Suppose Webservice.asmx) is hosted on one server, suppose www.xyz.com
b) On www.xyz.com domain, a javascript file is present who accesses this webservice.
c) On www.test.com , the javascript file of www.xyz.com is included in html page.
d) When i run html page of www.test.com site, i got following error :
" 500 internal server error(Check in browser console)."
e) When i include same javascript file in html page of www.xyz.com domain then it works fine.
f) Both applications are running on IIS6.0

I am using this code for cross domain web service call :

$.support.cors = true;
 
    $.ajax({
        type: 'POST',
        crossDomain: true,
        dataType: "jsonp",
        jsonpCallback: 'jsonCallback',
        contentType: "application/json; charset=utf-8",
        url: baseurl + "/HelloWorld",
        data: '{}',
        dataType: "json",
        success: function(data) {
            alert(data.d);
        },
        error: function(err) {
            alert(err.statusText);
        }
    });

I added this header entry in IIS6.0 : Access-Control-Allow-Origin" value="*"

When I run it, i get 500 internal server error(Check in browser console).

Can anyone please let me know how to solve cross domain webservice access issue.

Thanks in Advance.