Hi Mac - thank you for your help again.
I did that and it was still not working until I unchecked the 'Use VST/DXi' box in the MIDI selection - might have been the problem all along! I was trying to use Sampletank the other day so suspect I inadvertently checked it somehow then.
As Noel said, a lot has happened since the 2007 version - a lot of learning to do!
Best wishes
Godfrey