Help With Sbox

[pony]

I recently got an Sbox chip for my PS2 and a Gameshark v. 1.6. I installed the chip and soldered the two points together and tested with an original game. The original games work as well as ntsc all my DVD's. I then tested an original playstation backup and that worked fine as well. But when i try to start up my ps2 backups, the 1st Gameshark cd doesn't even load. It says "please insert a playstation 2 game" right after starting the machine up. So I can't even get into the the Gameshark main menu to play my ps2 backups. The Gameshark is inserted into my first memory card slot, and the sbox is inserted into my top usb port. If you know why my gameshark cd isn't loading or have any suggestions, please let me know, as i'm desperate to get it working! Thanks.