pykaraoke gets no sound while playing midi files

[LTSmash]

Description: Ubuntu 9.04
Release: 9.04

pykaraoke:
  Installed: 0.5.1-1ubuntu1
  Candidate: 0.5.1-1ubuntu1
  Version table:
 *** 0.5.1-1ubuntu1 0
        500 http://mx.archive.ubuntu.com jaunty/universe Packages
        100 /var/lib/dpkg/status

I just installed pykaraoke and tried to play some songs which did work before I installed Ubuntu 9.04 (it worked on 8.04)... I tried with most files, and they work on other karaoke players I've got in other OS'es installations... I can play those MIDI files with the preview under nautilus and also with timidity directly, but I dont get any output in pykaraoke... tried running it from console but i get no errors, simple no sound...I'm running it clear without any parameters, and timidity actually wors with it's interfases and also in others apps (like tuxguitar)...

By the way, it does plays correctly MP3+G files...