How to use VST Multi mode

Hello I
´m new and hope for your help.
I want to use nT for my live-performance. No recording situation. Just to root my midi equipment.
In spite of testing a lot i found no possibility, to use the ProteusX VST Multimode or to route signals from two masterkeyboards to two several Output-Ports simultaneously.

I use Ntrack Studio 6
Windows Vista Home Add.

Masterkeyboards:
EMU X-Board 49 (= USB Interface and Proteus Dongle)
Roland A33



Synthesizer:
Proteus X VST
Waldorf Microwave 19" Expander
Korg X5

Midi Interfaces:
Midiman 2 (2 x in / 2 x out)
EMU X-Board 49


Thank you for your help!