About .Net compact framework and windows ce

Hi you all.
Has any of you ever used the .net compact framework accessing to an oracle database? I've done this:

- Installed SDE (Smart device extensions) over Visual Studio .NET 2002
- Downloaded and installed Microsoft .NET Data Provider for Oracle.

I add the reference to my Smart Device Application Project, and I get a System.Typeload Exception if I just try to declare a new OracleConnection object reference. I mean:

Dim cn as Oracle.DataAccess.Client.OracleConnection

The most amazing thing to me, it's that it just doesn't execute anything. It doesn't fail at the line where I create the object, but doesn't execute anything!

I really appreciate any help, since I need to do this. Did I do anything wrong?

Thank you very much