Cyrtil, thanks very much for your quick reply!
I have never worked with iAC before and am have two problems, but you may not be aboe to heap, as you are using Logic (and I am DP). First probelm is that, after enabling IAC, when i attempt to arm a midi track in DP that has been routed to IAC, DP will send me a warning that arming this track would create a midi-loop and will not allow me to arm the track. Hence no midi data can be routed to VEPro5. Second thing is that, if I go back in to AMS, to the setup of IAC, and attempt to remove the "midi IN" port that would be causing the midi loop mentioned above, AMS will not let me change either the number of midi IN's or midi OUT's for the IAC port.
So again, thanks for your quick reply and if you have any thoughts about the above, thanks in advance!