FileForums - anti mod chip code for Medal of Honor Underground

Hello,

I recently purchased a Ps-X Change 2 to boot my backup playstation games, and when I tried to play my copy of Medal of Honor Underground, it didn't work. I tried it a second time, and after about 30 seconds, it booted only the screen that has the copyright of the game on it and a few commercials on it. I tried it again and it didn't work. So, I tried to play a copy of Wild 9. This game worked perfectly every time I tried it. So, my question is this: will an anti-mod chip code for Medal of Honor Underground allow me to play my copy of the game, or will I need something else? If I do need an anti-mod chip code for this game, where can I find it? If anyone out there can help me, I would greatly appreciate it!!!!!!!!!!!!!!!!!!!!!!!!!!