NOOB quest (continued): Virus TI VST & Ableton - Keyboard disabled & no MIDI data

[tutenchamun]

Sorry to bother again - but reference guides I have found so far only sccratch the surface of everything.
I am not getting that TI VST thing at all .... Ok, its great for sound programming - But it seems to disable MIDI note sending and is forcing me to use a different keyboard than the built in one.

DO I realy have to use a different keyboard as a Master while using the TI VST within Ableton ?????

• Virus TI VST enabled within Ableton - disables the Keyboard by default
  -> How can that default behavior be changed (I know I can enable the Keyboard - but it seems not to be advised - but does not explain why)
• Virus TI VST enabled within Ableton- disables MIDI notes sent to Ableton from the keyboard (Even if enabled post VST Activation - using the edit/config menu)
  -> how can that be enabled ?