Unhappy [Q] How can I improve touch sensitivity?

My MS2 is very unresponsive

when I touch the screen, it takes about 1/5 seconds to respond...

It is practically impossible to play Real Football or NOVA

I read somewhere that through rootools or typing on the build.prop is possible to adjust, but I could not find the option.

I'm using the new sbf and argenstone 1.5

but was already bad before installing the argent.

Someone can help me?

thanks and sorry for my bad english.