PS-X exchange 2 problem - black and white

[Gravastar]

I bought a PS-X exchange 2 to play the NTSC version of Crono cross on my PAL psx (not ps-one). I put in the little springy thing and booted the game up just how it said, and it DOES allow me to play the game. However, it always plays in black and white. Does anyone know why it does this, and more importantly how I can fix it!?

Thanks!