Hey guys, so sorry that my first post on the forums is due to a problem I'm having but I'm pretty stumped :/

So I have the 2012-11-18 version of guiminer and I'd like to mine on my gtx480 in the BTC Guild (using the US-Stratum server). All my video card drivers are up to date. When I attempt to mine with the default setting (CPU Affinity left all blank except for the first core) and the correct username, etc. I get "NameError: name 'OpenCLMiner' is not defined" in the lower left corner and am continually stuck at "Starting..." on the right corner.
When I make a new CUDA miner (I downloaded CUDA from Nvidia this morning as well), I keep all the setting the same, but when I click "Start mining!" nothing happens at all. The button is depressed, but the status at the bottom right still reads "Stopped" and I see no change in the window.

I've searched a bit about the the NameError (though I obviously still couldn't solve the issue), but haven't really been able to find anything about the CUDA miner issue. Any help would be greatly appreciated!