Enumerating domains results in an empty set

Hi all,

I'm trying to retrieve a list with all available domains on a computer.
When 
enumerating all domains using:
Set DomainObjectArray = GetObject("WinNT:")

I get no results (while this works fine, normally). Any ideas what
cir***stances can cause this collection to be empty? I'm dealing with a 
Windows
2003 SP2 server and an user with domain admin rights. The software is
running on the server (which is a member of the domain).
Thanks a lot!