Here is what I am using:

Outlook 2003 SP2
Project Server 2003

Here is the issue:
When clicking the Import New Assignments button in Outlook (from the Project
Server Toolbar), I get the following error:

An unexpected error has occured

Please reload the Project Add-in for Outlook by clicking Options on the
Tools menu. From the Other tab, click Advanced Options and then COM Add-ins.
On the COM Add-ins dialog, ensure that Microsoft Project Server Add-in is
checked, and then click OK. If this does not resolve the issue, you may need
to repair or reinstall the add-in via Add or Remove Programs from the Control
Panel.

Here is what I have done:
I did everything the error message instructed with no change in results. I
have also, removed and re-installed Office, with the same result.

Does anyone have any ideas as to the next step I should take? Much
appreciated.

Jason