Outlook 2003 Upgrade

I upgraded outlook 2000 to 2003 on a Windows XP machine and now outlook will not open. This is the error reported:

Faulting application outlook.exe, version 11.0.5510.0, stamp 3f1380f0, faulting module outllib.dll, version 11.0.5608.0, stamp 3f35d24e, debug? 0, fault address 0x0002d848.

Everytim outlook opens it reports and error and wants to restart.