I've been asked by a client to integrate Gemini into an existing web application.  Seemed to be an easy enough task -- he gave me the link to the DLLs (the CounterSoftGeminiServices22_0.zip file) and a code sample.  Except when I try to add references to any of the DLLs, I get the following message from Visual Studio:

A reference to '...\CounterSoft Gemini\Gemini Services\CounterSoft.Gemini.Commons.dll' could not be added. This is not a valid assembly or COM component. Only assemblies with extension 'dll' and COM components can be referenced. Please make sure that the file is accessible, and that it is a valid assembly or COM component.

It gives me this error on CounterSoft.Gemini.Commons.dll, CounterSoft.Gemini.Services.dll, and Microsoft.Web.Services3.dll.

I am attempting to load this in a Visual Studio 2003 project, .Net 1.1.  Is that my problem?  (I checked, but I couldn't find requirements on the web site saying it needed anything greater.)  Do I have a corrupted download?  (How can I check?)