From log.txt.

codo_joystick_init
  found 1 joystick(s)
  0 BUFFALO INC. BUFFALO BGC-FC801 USB Gamepad 
ok

In my system this joystick works fine, but in Voxatron I can move only forward and backward b[/b], and can't move to top and down b[/b].

I have a similar problem in Ubuntu 11.10. When I try re-binding, it sometimes reads up and down as left and right, or doesn't recognize any directional input at all. MAME reads the same gamepad fine.