I already tried it with a PowerPak with the 1.32 mappers... the NSF took forever to load, and then everything just goes black.
However, I've tried it on both the latest beta of Nintendulator and with NSFLive, both of which are ace players, and your NSF doesn't break in either of them. So, it could just be an issue with the nsf.nes ROM on the PowerPak.
Maybe an .NES will get better results. \o/