PSX Change2 for Japanese Version of DragonBall Games

[watson2]

I am an uninformed parent who bought PS-X-Change2 over a year ago so my son could play his newly purchased Japanese versions of Dragon Ball Z Ultimate Battle 22, Dragon Ball Final Bout and Dragon Ball Z Legends. We followed the directions for PS user and put the spring in, no problem. We put the disc in and it would never let us use the games. We are at a loss and we have a disappointed kid. Can anyone help us out there? Thanks!