The integration provided by Visual Studio between Silverlight and and WCF Service is good but can be frustrating. Here are a couple of simple things to try when things don’t appear to be working;
1. I’ve created/changed my service but when I update the reference or attempt to discover the new sevice it can’t be found – make sure the service has built by rebuilding the service
2. I’ve changed the service and ran ‘update the service reference’ but my Silverlight code cannot see the changes, in fact it seems to have lost all references to the proxy code – rebuild (not compile) the Silverlight project.