Massage keypad stop working

[Mamoor]

hi
any body can figure out my problem with htc amaze 4g, it's massage keypad suddenly stops working for 1 to 2 minutes and making me annoying day by day. Please help to get me out from this kind of trouble.

 

[B. Diddy]

Welcome to Android Central! Does this problem persist after a reboot? Does it only happen in the Messaging app?