Changing VST with a second MIDI controller.

[Julesg]

Hello

I cant work out how to do this so would appreciate any help.  I use PianoTeq VST, and works fine for the instrument assigned to it and can be played through my master keyboard.  But I want to control its other functions such as changing to another preset, via another midi controller, but the VST does not see any other midi input.

Any ideas?

Jules