Volume control with HSO and Cubase 6

With Cubase 6 and HSO I have the problem in the use case
-I play a note with the Midi piano on a HSO channel
-press the Volume from the Midi board
-> in Cubase 6 the “Automation” of the VST Channel goes to On
-> nothing to hear any more

If I move the Volume, the tone comes eventually, after some time
-with HSO Standalone the volume works fine
-also with other VST Plugins than HSO the volume is OK

Only the combination : HSO with Cubase 6 does not work

Thanks for any help!

move the mod wheel down then up.