martin_demsky, I guess your player doesn't want to play an uncompressed module (which also possibly has no correct CRC in it).
The only thing to play it I can offer is my customized version of Aossf 1.21 Winamp plugin - http://filebin.ca/34G33W4d4yk7/02___.zip - where a simple resampler was added (not Linear; a bit more advanced than it, but not much, and the code became a bit more dirtier (after my insertions) than the original, which I've initially got, had).
I also didn't notice any difference between Rockman and Megaman; that, IMO, meant to be the same game.
Matej, thanks for the introducing datasheet.
I might use it if nobody will recognize the tracker (tracker where I could load this module to edit it).