Controller Help!

Ok, so this is how it is.

One of the directional buttons in my PS2 controller was stuck, so I had someone open it for me, and then we put the directional button back into place. So anyways, when we closed it back up and tested it, it did something really strange

You see, every time you hook it up, the curser (on any screen, whether a game, or the PS2 menu) goes nuts. Does anybody know why its doing this, and what I can do to fix this problem?

It would really help because; I actually have the same problem with one of my Hori Sticks.

Thanks guys!

bump! help!