CROSSFIRE NOT WORKING! HELP!

[nexus_nexion]

My EAH 4850 1GB running in crossfire seems to be detected by GPUz Tool & CCC even Smart Doctor, it was running fine at start until i saw pixel flickering so i decided to reinstall the driver, before i reinstalled the driver FPS for CSS and WOW was above 120. After ive had reinstalled the driver, the FPS rate dropped down to 60 for both games. Is it the driver that im using which is not working properly? or is it to do with the build i have?
On GPUz it says Enabled [2 GPUs] unsure on Vista64 next to ATI Crossfire
The box in CCC is ticked... but when it comes to gaming it just doesnt show the performance that i want...

Specs
DP45SG (P45 Chipset)
q6600 2.4ghz
2x EAH4850 1GB
4GB DDR3 1333mhz
800w PSU

any useful drivers or tips? plz post
im really scratching my head out =[

 

[Kaldor]

Shut off PC, pull one card, start back up, check FPS. If your getting the same FPS as with Xfire, you have a problem. Id start with uninstalling all drivers, shutting down PC, adding in second card, then reinstalling new drivers and see what you get then. You may also have to try different driver versions to get he best performance.