Directory Services and ASP.NET

[BeGomes]

Hi all...
I have a dll in vb.net that I use to do all my security
stuff. Among the classes I created in the dll, I wrote
one that accesses the Active Directory and retrieves any
type of information I want from my network AD. I works
perfectly when I'm calling the class within a windows
application, but I keep receiving an Unknown Error when
calling the same methods from a asp.net page.
Has anyone any clue in how to solve this?
Thanx,

BeGomes