I am running Windows XP Pro, IE 7 Beta 2 (default browser), FireFox (actual browser being used) and have downloaded and installed MSN Messenger 7.5. I would prefer to use MSN's messenger rather then Trillian, GAIM, etc.

It appears as if MSN Messenger 7.5 has installed correctly, as I can run the app. I log onto my profile, and it even gets so far as to show me my contacts as well as the MSN Today page. Within 15 seconds of me signing in however, I get the following error:
Messenger has encountered a problem and needs to close. We are sorry for the inconvenience.

The only option is to close MSN Messenger.

Anyone have any idea what is causing this to happen and how to fix it? Microsoft's KB has nothing, and Google didn't find anything useful.