modchip question!!!

[///m3]

I have a modchip, it was once install in a wrong welding place, but now it is working well after correcting the problem.
I can play some copiest game, but there are some which I can't play. for ex. I have two japan soccer back ups which I can't play?
a have the chip from playstationmods.com

[rimmer]

if you can play some backups it probably isnt the chip m8

[spooky]

Definatly not the the chip as rimmer stated, so this leaves the backups them selves.

You could try using different media.