Darin and Dave did a fantastic job unearthing the issue, and figuring out the fix. Simply put ( and I hope I am not jumping the gun here Darin, but I already had an email asking for the details), the issue apparently was the transmission speed using the MIDI-OX program, and the Z4, I don't know if this is on ALL or just a few. The fix for me, as sent by Darin, is as follows:
1. In MIDI-OX, go to Options > Configure Buffers...
2. For "Low Level Output Buffers" change the "Size" to 128 and the "Num" to 32.
3. Click 'Ok'.
Thats it! I'm no computer whiz, but near as i can tell, that changes the rate at which the info is downloaded to the zendrum, and that worked beautifully.
I am using a simple Alesis Midi Interface cable, it does not require any drivers. It simply plugs in to the USB port on my computer, and the two outputs plug in to the zendrum... the Alesis Midi IN plug to the Midi OUT of the ZD, and the Alesis Midi OUT plug to the ZD Midi IN.
Kudos to Dave, Darin, and the engineer (?) for all their efforts in solving this problem. The customer support at Zendrum Corp and by Darin with Zenedit is second to none. Both gentlemen were very involved in helping get this resolved. Phone calls, testing different fixes, guiding me on the phone, etc. I can't say enough about this. These folks don't just talk the talk, they walk the walk!