Default [Q] My Live WT19i touchscreen problem after flashing a rom!

I usually flash roms found on xda and was pretty happy.
But few weeks back after flashing a cm based rom, my touchscreen is not responding well. It recognizes my finger after 1/2 times touch and it's really irritating.

After the problem, I flashed stock rom, but it didn't work too.

What should I do? I don't wanna lose the WT19i Walkman because the sound quality is too good.