.NET dll network error

Hi All

I am using the WINscp .net dll and all is ok when I run it from my laptop on which the windev applicaiton is being developed.
Once I setup the software, including the winscp dll etc and run it, I get the following error:

NET framework cannot be used by an application run from the network.

All dll and exe's are on the local C: drive but the computer is part of a domain.

Does anybody ever experienced anything like this?

Thanks
Noel