the touch scree froze while send/get a phone call
 

Hi
i have htc touch pro and the touch screen works paerfectly.
the problem is when i send or get a call there some bottuns on the screen like: end call, contacts, mute, notes .... i press them and they dont respons, i also have the slide to answer and i try to slide right or left and it dose not slide - it seems like the screen is frozen when i send/get a call, in all other apps like s2u2 and others all working fine .....
i did hard reset and rom upgrade .... didnt help.

its not black screen during call ,,, its frozen screen during call.

please help


thx

Michael