Silverlight enabled WCF service Hosting

Question

I have setup/hosted my silverlight enabled wcf application in IIS. I have added .xap/.xbap/.xaml in IIS MIME type. User interface is working fine. Xaml page is opening perfectly.
But the problem is, silverlight enabled WCF service is not working. I dont know what is problem.

I there binding type problem? endpoint address problem? IP address/Localhost problem?

What is solution?

Urgent help needed.

Thanks
Raman