- I'm using  WebService with IWeb module (http://www.adefwebserver.com/DotNetNukeHELP/Misc/Dotnetnuke_Secure_AJAX_webservices.htm), Cuz i'm using Google Map API, which have a function called GXml.parse(xmltext). The Content-Type in the Response Headers when calling webservice with IWeb is "application/json; charset=utf-8" and the GXml.parse thrown an js error with this. So, i think the Content-Type must be "text/xml". Please help me how can i set the Content-Type in this case ? Thanks alot!!!!

- Thanks for ur reply. You're right, IWeb just sercure the webservices, it don't call webservices. And i still wonder to know that how to change the Content-Type of the Response Headers to "text/xml" in a webservice class file (code behind). For example, you have this:
Partial Public Class WebService
        <WebMethod()> _
        <ScriptMethod()> _

        Public Function getData() As String
                Dim data as String
                //How to change the Content-Type to "text/xml" here ?

                //Do something here
               ..........................................
                Return data
         End Function

Wow. Thank you for posting the solution.  It's refreshing.