I've been upgraded to a Win 7 (64-bit) machine and am having problems with Outlook. It won't open at all. Gives this error detail:

Problem Event Name: APPCRASH
Application Name: OUTLOOK.EXE
Application Version: 11.0.8169.0
Application Timestamp: 465f28e3
Fault Module Name: LSMSSP32.DLL
Fault Module Version: 6.0.5902.6
Fault Module Timestamp: 4bbb7b4b
Exception Code: c0000005
Exception Offset: 001a5547
OS Version: 6.1.7601.
Locale ID: 1033

Additional information about the problem:
LCID: 1033
Brand: Office11Crash
skulcid: 1033

What should I do?