I just bought a Flip-top cover for my PS2 with the Swap discs. I installed it, but when I turn it on with a game inside, there's a very loud whirr while the game spins. Is this supposed to be normal? I also caught my PS2 actually skipping (it's never skipped any of my games before) after I installed this thing. Did I do something wrong? Is the cover on too tight? I need some serious help here. Any advice would be very appreciated.