Error message

[jersey]

Hi- I keep seeing this error in powerpivot and it keeps crashing. what should i do? please help.

Problem signature:
Problem Event Name: APPCRASH
Application Name: EXCEL.EXE
Application Version: 14.0.6112.5000
Application Timestamp: 4e9b2bb3
Fault Module Name: EXCEL.EXE
Fault Module Version: 14.0.6112.5000
Fault Module Timestamp: 4e9b2bb3
Exception Code: c0000005
Exception Offset: 0046d6b2
OS Version: 6.1.7601.2.1.0.256.48
Locale ID: 1033

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