Xbox 360 Controller help

Hey guys,

I just set up dolphin and attempted to play a game, and everything seemed to be working fine. However I noticed that when i connected my xbox 360 controller and calibrated it in the wiimote section, (Classic Extension) the controller would drift to the left. This does not happen when I use other emulators for n64 for on the computer, and it works fine so I know this is not a hardware issue.

For example if i am in a menu, my selected option will continually slide left as though I was holding the left contolstick in that direction. I can sometimes correct it by moving the controlstick to the right, however it usually resumes a few seconds later.

This occurs in both wii and gamecube games, although I have not tested many of each.

Please help as this cripples the emulators use on my computer.

(Mac 10.8.5)

Thanks,

Lufthansa747

Attached is a pic of my current setup.