I´ve investigated a little further and here are the results:
– Cubase6 has problems with the 32bit plugin version. But this is the case with many plugins running on the 64bit version. Crappy vst bridge app…
– I could not get my panel to work with any MIDI path inside the host. It´s only working when I select input and output devices not occupied by the host. That in fact completely bypasses all plugin functionality and except the panel runnning inside the plugin it just as running controller standalone.
What did work though was recording controller movements into cubase. But then again during playback they are not reflected back to the panel.