Outlook 2007 Shuts Down in Windows 7

[TOActor]

I did a clean install of Windows 7 64-bit Home Premium about four months ago and have been frustrated by Office 2007 apps closing down for no reason and my having to restart it. This is especially frustrating when I'm in the middle of composing an email in Outlook 2007 -- the dialog that it needs to close and then restart happens at least once a day. Here is the detail I receive:
Problem Event Name: APPCRASH
Application Name: OUTLOOK.EXE
Application Version: 12.0.6514.5000
Application Timestamp: 4a89dc70
Fault Module Name: olmapi32.dll
Fault Module Version: 12.0.6514.5000
Fault Module Timestamp: 4a89d653


Exception Code: c0000005
Exception Offset: 00003226
OS Version: 6.1.7600.2.0.0.768.3
Locale ID: 1033
Additional information about the problem:
LCID: 1033
Brand: Office12Crash
skulcid: 1033

I'd appreciate any suggestions on what may be causing this and any solutions. Thanks.