In MIDI preferences, even though you have the 'Use default DXi' checkbox enabled, do you have the MS Wavetable synth selected as the device in the box above the check box?
For some reason we have seen this fix a weird problem or 2 before.
Just a shot in the dark. It shouldn't matter since all MIDI is getting re-routed, but like I said it has helped before in weird situations.


Make your sound your own!
.. I do not work here, but the benefits are still awesome