3.04 -> 3.1 upgrade, win2k, IIS5, cannot login to Admin

Upgrade was a little clunky…ran through the fix found here for the homepage failing to load, public side of the site is now functioning properly.

However, when going to /wp-admin/…

1. Login screen appears

2. Attempt to login with proper credentials

3. Screen refreshes…right back to the login screen

4. Repeat attempt with proper credentials

5. Same result – back to login screen

6. Attempt to login with bad credentials

7. Failure appears as expected.

As a result, my assumption is that this is not a database issue nor a user issue, but perhaps something to do with redirects in the same manner that the homepage needed a plugin to fix the issues seen there.

Thoughts and/or assistance greatly appreciated.