thanks (thedirt) for the reply. i keep practicing but somehow i cant build up my speed. sometimes i got stuck when i sweep till the 5th and 4th string and the coordination of my left and right hand sometimes get correct and sometimes do not. i also got problem in alternate picking when my right hand picked till 4th, 5th and 6th, my pick will stuck halfway... i dun know what is goin on, so i decide to change whole set of my string to fender superlight, but dun know can change my current situation or not...