Nice, I actually have been having some problems with my Ascii Guilty Gear PS2 stick, it keeps stock on the right direction, I took it apart and remove the stick from the harness to see if it was the stick (sanwa stick) and I'm afraid the problem is with the PCB which sucks 'cause there's not much I can do about that, what bothers me the most is that some of the other buttons (Start, Select, etc.) are directly attached to the PCB so it's not like I could just hack a pad and done deal, I would have to modify the original pcb to still use them buttons proper with a hack pad.
Pain in the ass, this stick is way too awesome for this to be happening to it, I love this stick for my PS2 shooties and of course Guilty Gear.