Problem With Quicktime Pro, How to use another synthetizer ? Options

[tedeka]

I use MacOS 10.3.3 and Quicktime 6.5 Pro

And a Roland SoundCanvas Sc-88 Pro synthetizer.

It is connected to the Mac through an USB-MIDI interface Yamaha UX16.
The drive for this interface for max OS X is correctly installed.

I think of having well configured "Audio and MIDI Configuration".
(correct ID, etc.)

However, my Roland synthetizer is not listed in the preferences of
Quicktime/Music. Only the Quicktime synthetizer appears. The
interface Yamaha UX-16 does not appear either.

Therefore, when I want to reproduce a MIDI file with Quicktime
Player, I can only use the Quicktime sounds. Not average to choose my
synthetizer Roland.

Does anybody have a solution?

Thank you in advance.