[RM2K] MUSIC WON'T PLAY :C

Hi.
I'm playing "JoJo's Bizarre Adventure - The 7th Stand User", a game created with RPG Maker 2000, my problem is that the music doesn't plays :c

The files are in format .Mid and when i try to open any of them in my media player (AIMP3) they doesn't play there either, basically, i can hear any .Mid at all :/

There's some .wav in there for some SFX like Earthquake or Rain and those play perfectly, btw :c

Is there something i can do for fixing it?
I'm using Windows XP SP3 x86, thanks in advance for reading and greetings from Uruguay.