Game constantly pressing select

[joeledge]

In trying to play a rom, it's very slow (but I know that's already been raised), more problamatic though is the game in question has a menu accessed by pressing select and select appears to be constantly being pressed, I've tried with the crank docked, open, up and down and not moving, either way it keeps going back to the select menu whenever a button is pressed (e.g. right or left on the dpad).