Windows live messenger

plz can some one help me i cant log to my msn messenger anymore

i get the following error.

Problem signature:
Problem Event Name: BEX
Application Name: msnmsgr.exe
Application Version: 14.0.8089.726
Application Timestamp: 4a6ce533
Fault Module Name: StackHash_cf87
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 00000000
Exception Offset: 00000000
Exception Code: c0000005
Exception Data: 00000008
OS Version: 6.1.7600.2.0.0.256.1
Locale ID: 2057
Additional Information 1: cf87
Additional Information 2: cf8724f0b76c34f7665e0f6b60d5ab01
Additional Information 3: b0e8
Additional Information 4: b0e873aa28d058612292d9f6b0c7ce7c

What happens if you uninstall/re-install the app?