Neo 2.2 chip???

Hello i have just got my ps2 back from the store where they put in a neo2.2 chip.
I also have the Region-X cd and a seperate cd to play American backups.

But i cannot play the backups because when i put in the Region-X cd and it boots up and i see on screen 1 2 3 4 5 6 , i press eject button en replace the cd with a backup and press start on my joypad, but nothing happens, i only see a black screen and nothing else.
Does anyone know what i am doing wrong and why doesen't my backups work??
I hope that someone can help me with this.
Thanks
Edwin