This is blog entry will help those who understand Cross Domain restrictions in Silverlight while calling a WCF service in another domain. If you already tried many prescribed things to allow Cross Domain Access like placing the clientaccesspolicy.xml in wwwroot folder and putting a crossdomain.xml on the IIS root (wwwroot folder). But still you are

(Code download) Introduction This is the second in a series of posts on the support for duplex communication with a WCF service added to Silverlight 2 Beta 2.  I should point out that this technology in its current form has been deemed by Microsoft as not yet fit for production applications and is therefore currently for evaluation