Problems with my joysticks

Few years ago I brought an generic joystick, he worked fine and dandy, When it started to having some problems with the X/Y axis for me was fine because was jus plug in and out a few times to get it to work again. After a few months of the problems beggining I brought an Saitek X52 (Not the Pro one) not because my older one was having troubles but just because it was getting old. This new Saitek, never worked, the X/Y/Z axis of the joystick just go crazy, I mean when I push it too much to the left it goes all the way to right, when I tried to pull my plane up it puls the plane up but also trowns the ailerons all the way to the right. I though that the joystick was with some kind of failure, and pluged in my older joy. For my surprise the both are having the same problem and I cant fix it. Any idea guys?