Button use

[jncunningham]

So, I'm playing paper Mario thousand year door, and there's an instruction bit for every new hammer I get. Anyway, for one of the hammers I have to hold down B (which is the x key on my keyboard) while rotating the joystick(my arrow keys) and then release B (x). But for some reason, it's not registering that I held down B. (I've already tried configuring the B button as other buttons/scroll and I can't skip the instructions) please help!!