This is really strange. I set up a new cube last night and it seemed to be running fine for about an hour, but by the time I was preparing to go to bed it had dropped to a flat 0. It seems to function in short bursts getting to ~600MH/s but always flatlines after a few seconds. I was hoping it was a problem with Slush's pool and not on my end but it doesn't look like that's the case.

Here's a shot of the configuration:

(It shows 10GH/s but within a minute of taking the screenshot it dropped back to 0)
http://i.imgur.com/zoxRg0P.png

Any advice? I tried restarting everything, including the router and my PC, but the problem persists.