I hope Sarah doesn't get mad at me, but I found another Music Piece that said it wasn't compatible with my Windows Media Player. It's located on the "Mario & Luigi: Partners in Time Game Rip" Section of GH:

039 grab third cobalt star shard from petey piranha sfx.mp3

I don't mean to be a Pain... But I found three more MP3 Files that gave me the same Error Message. It's still in the "Mario & Luigi: Partners in Time" Section of the GH:

049_star_hill.mp3

053_cobalt_star_opens_the_shroob_gate.mp3

060_end_adventure!.mp3