And yet we've wasted almost an entire day without any real progress. If you post nothing you did so far then we must assume nothing has been done. If you'd posted those, we could have been further on by now.
At this stage, I'd have to suggest a new system folder. It sounds as though the old server wasn't properly removed when migrating to the new one or else there's corruption somewhere (let's hope not). If this doesn't do it you'll need to call MS support and have an escalation tech assist you. I don't have full access to the KB like I used to and I'm sure they probably have some internal only solutions.
Anyhow, try the steps here and let us know.
http://support.microsoft.com/kb/822444