thanks for your help guys.
I guess I have to change my touch screen, I guess it got defect or somthing.
But I have one more question, I have earthlcd sk-2009R kit which a lcd controller has built-in touch screen controller.
Do you think I could just get touch glass and use it with this controller? or just get seperate touch and controller?
what does a controller do? Does it just convert signal and send it to PC ? or does it somthing to do with accuracy and sensitively?
I just want to save some money if I can
and does anyone have experience with earthlcd touch? or what is good touch for <$200 (10.4") ?
once again. thank for your help