My mod chip won't allow gun to work w/ Time Crisis

[cheezdip]

I usually burn my games, but I had to buy Time Crisis cuz I couldn't find it anywhere at a reasonable dl speed. Anyway, when I put the game in my psx, the gun wouldn't work with it. My friend tells me it has something to do with the fact that my psx is moded. Is there a patch or any way for me to make a workable copy? I'm willing to burn it or something, just to get the damn thing running.

thanx anyone.