Fighter maker 2 help

[blitzwing]

Hi guys.
I've been using Swap Magic to play imported games on my PAL PS2. I've got 2 CD and 1 DVD based games and they all work fine.
Last week I imported the US version of Fighter Maker 2, a game that was never released in the UK.

I've wanted the game for years but only recently got the Swap Magic software.
Anyway, bottom line is the game isn't working. I keep getting a "Not a valid PS2 disc" error message.

I've been hunting for patches for the game, thinking that making a back up might be the answer, but I can't find a patch site with the file on it.

Anyone got any ideas? Its really killing me that I can't play this game that I just bought.