Neo Modchip Problem - Help!

[cobraxt]

I have a USA V1 PS2 with Neo 2.2 Pro and Gameshark 1.0

Before I installed the modchip, I was using the Pulley/Knife Swap trick and my PS2 backups worked fine.

After installing the Neo 2.2 and double checking all solder points, I am unable to play those same PS2 backups and unable to directly boot PS1 games (I have tried all the different booting/swapping methods).

When I took off the PS2 cover and exposed the CD Tray, I was able to swap my Gameshark disk with the backup and the game worked fine.

It seems that when I press the EJECT button on my PS2 to swap the gameshark with a backup game, the system realizes that it is trying to play a backup game and refuses.

If this is the case, what should I do?

Any help is greatly appreciated.

Thanks