Kristin:

When no one responds to a post it usually means no one has seen your problem before.

One question comes to mind. If these workstations were working before, what changed? Typically something has to change to break any software as software that was working doesn't break on it's own.

When you say "We have two users getting an error message..." I'm assuming you have other users that can access OE successfully. These types of problems are virtually impossible to fix over a forum.