stange that it didnt work with the win machine also/
windows can use the star240 driver...
the 1200 should work.
Try a differant cable. Maybe it`s that the port is making a proper contact on the 500, ( because it`s worn?).
Ther is a site with amiga specific drivers on it.
http://www.blizzard.u-net.com/download.html :-D
