I have windows 7 x64 and I have no problems.
I have a laptop with similar configuration Compal KHLB2 with ATI HD 4650 and no problem I downloaded the latest drivers from AMD 12.4 by auto detect.
I did and nothing.
I have the same problem, I have a HD6850 and after installation and commissioning ATT message pops up "Can not initialize library atipdlxx" , I...
For me work as expected, no longer crashes OpenGL [IMG]