Crystal Reports works in development, not in the live environment

Hi,

We are using Crystal Reports XI and Visual Studio 2008. When we incorporate a Crystal Report in the development (i.e. local host) environment everything works fine. But when we deploy the web app to the live server the reports fail giving error messages suggesting that the requried dll's aren't found. I've noticed that the dll's in VS2008 are version 10.5 and on the server the dll's are version 11.0. Yet the reports are developed on the local host where the 10.5 version is located. The host server for the web app is the same one used by Crystal Report Server XI. Anyone have any thoughts about where I can begin to trouble shoot this issue?

Is anyone aware of any references for developing Crystal Reports in web applications?

Thanks in advance for your responses.

Tony