i know this thread is solved - unhnd exception nailed it. but i wanted to add a small addition to it.
where i work we have a windows domain with roughly 100 a/d users
One one a/d user is actually an administrator
i dont allow myself or my coworkers to be administrators for security reasons. There is one admin account and only one that can be used if needed.
personally i feel that this is a good practice and adds an extra layer of security