I am not sure if this is a known bug. My RealBand 2012 is updated to ver6.0

I have a VST synth (KONTAKT from native instruments).
I set a MIDI bass track in RealBand to sound through (Lets say) channel 1 of the VST instrument
It sounds ok. The MIDI goes through the VST instrument and it sounds.
Now, I hit stop / rewind and then play again and the sound coming from the VST instrument is gone.



The VST synth ceases from delivering any sound while it shows MIDI activity passing through to it.....

It feels that every time I stop the song and then play again, it mutes the VST synth for some reason....


Any Ideas?