Dave Smith Instruments SYNTHESIZERS

here's my setup: PER, MED, through a Edirol UM880 interface connected
to  Windows XP pc. Trying to get Vyzor V1.0 editor to communicate with
the evolvers. this setup works fine with the soundtower editors. Not
so with the Vyzor editor.

Does anyone have a setup similar to this that could give some advice?

Thanks.