Snatcher burning probs

this is about the 50th game i have made and its out of sync, i got a bin+cue of snatcher of gameunits ftp i tried it in gens and it loads up the european bios so its my understanding that this game is european/50hz, so i use the bin+cue and burn a cd in cdrwin and i put it in my mega cd/european and its out of sync probably by about 2 secs the audio is behind, unless scottish mega cd's run at 40hz am out of answers lol