Hi there,
Sounds like your DLL has references to other DLLs that are installed on your machine, but not on the server. Or your server is running on 64 bits while your component can only work in a 32 bits environment.
Since this is not directly related to my book, would you mind posting questions like these in a more general ASP.NET category:
http://p2p.wrox.com/asp-net-4-539/ ? Makes it easier for everyone to find what they are looking for.
Cheers,
Imar