My outlook keeps crashing.  It often happens when I hit send on an email.  Here's the error message I get:

Microsoft Error Reporting log version: 2.0

Error Signature:
Exception: EXC_BAD_ACCESS
Date/Time: 2013-11-18 05:30:47 +0000
Application Name: Microsoft Outlook
Application Bundle ID: com.microsoft.Outlook
Application Signature: OPIM
Application Version: 14.1.4.111121
Crashed Module Name: libobjc.A.dylib
Crashed Module Version: unknown
Crashed Module Offset: 0x00005a8b
Blame Module Name: Microsoft Outlook
Blame Module Version: 14.1.4.111121
Blame Module Offset: 0x0000bcda
Application LCID: 1033
Extra app info: Reg=en Loc=0x0409
Crashed thread: 0

I'm running a 13-inch MacBook Air (mid-2011) with OS X 10.8.5 (Mountain Lion) and Office for Mac 2011. Any help on why this keeps happening would be appreciated.