I have a Silverlight app hosted in a Web app (with a WCF service) - both created in project in Visual Web Developer 2010 Express. I use VWD to publish the app to Discountaps.net, which goes fine. But when I try to access the service ( type: www.domain.net/WEBService.svc in the browser), I get error 404: Not Found. I have enabled Failed Request Tracing and in the trace file produced, I found this error 2 times: <EventData> <Data Name="ContextId">{00000000-0000-0000-A573-018002000014}</Data> <Data Name="Successful">false</Data> <Data Name="FileFromCache">false</Data> <Data Name="FileAddedToCache">false</Data> <Data Name="FileDirmoned">true</Data> <Data Name="LastModCheckErrorIgnored">true</Data> <Data Name="ErrorCode">2147942402</Data> <Data Name="LastModifiedTime"></Data> </EventData> <RenderingInfo Culture="en-US"> <Opcode>FILE_CACHE_ACCESS_END</Opcode> <Keywords> <Keyword>Cache</Keyword> </Keywords> <frebescription Data="ErrorCode">The system cannot find the file specified. (0x80070002)</frebescription> </RenderingInfo> <ExtendedTracingInfo xmlns="http://schemas.microsoft.com/win/2004/08/events/trace"> <EventGuid>{AC1D69F1-BF33-4CA0-9313-BCA13873E1DC}</EventGuid> </ExtendedTracingInfo> </Event> Can anyone help me?