Sadly you are not alone. See the threads over on the VST forum…
Presuming that you are 64-bit Win7?
If so, the choice seems to be ‘no MIDI export’ or ‘use jBridge’ - and Steinberg just don’t give…
Disgraceful that their own virtual instrument product isn’t kept up to date with their sequencer. Think yourself lucky, GA2 won’t even install…