Amd Turion TL-52 X2 on Amilo PA 1510> No way to change Frequency!

so today i tried out several governors!
i rebuild my kernel many times and tried a lot of combinations i read in posts by searching the net for any solutions of my problem, but none got my cpu change to 1600 MHz
now im using performance, userspace and ondemand but none of them works. i can change the governor @ any time but frequency wont change.