no midivolume control cubase sx part 3 to 16 OS 6.5

[Supatunes]

This is the problem. when I create a midi track in Cubase SX for my virus c on part 1 or 2, I am able to control the partvolume with the cubase channel fader. But when I create a track in cubase on say part 3 till 16 of the virus I'm not able to change the volume with the Cubase channel fader.

The panning however seems to work on all virus parts. I've tried every setting and connection and even downloaded the most recent OS version from the official Access website It seems that Cubase sends the data, but the virus simple doesn't react.

I hope somebody has a solution.

Systeem info:

Computer: Mac G4 OS 10
Midiinterface: emagic MT 4
SSequencer: Cubase SE