Not getting any work from pools?

[Craftyman]

Hi, I am having a problem where I don't seem to be connecting to a pool or something. It's a bit tough to descibe. I am trying to connect to Deepbit or EclipseMC and my 2x HD6950's work at full speed for a bit but then drop down to ~340 Kilohashes after about 30 or so minutes and they never complete a single share. Is there something stupid I'm doing wrong? I am using the poclbm part of GUIminer and am selecting Deepbit from the dropdown menu.

Edit: My driver version is the Catalyst 13.3 beta 3

Edit tried mining on bitminter and I get nothing but miscalcs something is definitely wrong here...

[Craftyman]

Fixed the issue. Apparently poclbm does not like the catalyst beta opencl drivers, downgraded to 13.1 WHQL OpenCL driver.