The Fire-pro D curse HELP ME ;)

I have a Pal DC and several Original Japanese games.
Recently I had a problem with Fire-pro D.
Although the game works thanks to the Boot disc, there is some major screen distortion and no sound. Any clue ? Thanks

[drunkensailor]

i have a bunred fir epro d and it doesn't run with a bootdisc at all but my sound works but my screen is flipping and doing weird