i searched the solution on this forum and i found this guy has the same problem as me...

Dear all,
After i flashed a new ROM on WM6.5.3 for twice. I felt that's very beautiful screen like Manila TouchFlo. But my always face a problem is Calibration. When i type a message or doing anythings by touching my screen is always wrong way what i expected to tap. I tried to aligned the screen again and again... but still same problem. Then i tried to hard reset all, the problem still.
Now I wish to format and install Samsung OS Updater on to my phone like original default(DZIA5), but when i do it, i got a error message:"The device contain a newest firmware" from my pc. Then i can't do anything... Cry
Anybody here got experienced this and solved this problem? Or anyone can advise me what can i do?
Thank you
could some body help me out of this mess...