Dave Smith Instruments SYNTHESIZERS

A silly little problem someone might be able to help me with:

Just tried EV as a synth module for the first time last night. Under 
MIDI control from my K5000W via a midiman 4x4 interface into a PC 
running Cubase SL.

Some good sounds there. Problem is, the enveopes don't trigger if a 
key is already down. I have to play staccato to get them to trigger 
(ie lift each finger off the board completely before playing the next 
note).

Thought this could be fixed by altering the Trigger Select patameter, 
but it doesn't work. I can turn off triggering altogether, but the 
parameter values which involve retriggering just don't work.

Tried a few other keyboard parameters (Mode etc), with no success.

What am I missing? I'll try tonight with a direct cable from the 
K5000 to the EV, just in case it's something to do with the PC.

- Bill B