Not sure if this was solved, but I had the same issue.
I use Cubase 7 on Win 7. Check to make sure the Microbrute Connection oftware isn't connected to the Microbrute at the same time you are attempting to control Cubase via Midi, Windows does not allow simultaneous MIDI connections of one Midi device to multiple midi software programs. Disconnect the COnnection software, keep the power on the microbrute, shut ubase down and start it up again. ensure the Midi in is either ALl Midi or Microbrute and try again.