Hello everyone, need your expertise on this issue

recently i dled and installed ati driver 13.6 beta 2 from leshcatlabs.net, then the brightness can't be adjusted (same as previous),
last time after i switch to intel card, change the brightness, then change back to ati, everything works fine, and brightness can be controlled even using ati at that time
now, after i installed 13.6 beta 2, the method before can't be used anymore, and i have to switch card to adjust the brightness everytime i start up my pc. Then i used the brightness resolver, i changed to value like F840, F900, F940, all these just brought up BSOD, then i have to boot into safe mode to set it back to FFFF just to enter back my main window (even after i reinstalled the driver, the screen flickers whenever enter the main window, sigh).
Can anyone helps me on the brightness and flickering issue? thank you.