David,
thanks a lot once again. I've managed to load a soundfont into SFZ (Bernard: there seem to be an issue with its size: 1MB works, 80MB doesn't).
I also see the Maple ports in Composer. I've chosen port1 out as the default device. But no sounds. I hear sounds in SFZ hosted by SAVIHOST when I press the keys there.
Any further ideas.
Thanks for the patience with us PC dummies.

jörg