Wish I could help.  I haven't been able to figure out how to get mine to connect to anything BUT slush's pool.  I found the compiled binary online -- but it points to pool.itzod.ru.  When I give it the command line -o stratum.bitcoin.cz -p 3333 it works fine on Slush.  But when I try those command lines for any other site I just get dozens of repeating errors in the command prompt window.

I haven't been able to get over 10Gh/s on Slush and I do have to run at low clock.  Running at high clock gives me the same sort of issues you have.