Installed Visual Studio 2010 SP1, Silverlight WCF RIA Services v1.0 SP1, but when I deployed it on the server, was getting the following error:
Operation named '[complex method here]' does not conform to the required signature. Parameter types must be an entity or complex type, a collection of complex types, or one of the predefined serializable types.
Was doing a bin deployment where we don't have to worry about what's on the server.
But there's another DLL Saurabh missed that I found to have worked when deploying it after an umpeeth time:
These are rest of the DLLs I deployed:
Hope that seeing this helps anyone else!