Default [Q] HTC SALSA "F" BUTTON ERROR !! Help me

Hi Everyone ,
I am using HTC salsa ,,,, Recently the "F" button is throwing error when i try to post on Facebook ???!!!
Actually I cant able to post to my Face book wall,,,if i type in the textbox and click post , it just simply disappears then nothing happens.

Then , if i click Post to "My wall" option through f button,,,it throws error "Facebook for HTC sense stopped unexpectedly"

Note : I done Factory reset & Updated to latest Facebook app !! But the still the problem persist

How to solve this problem ??

please Help me !!!

Thanks in advance !!!