OK! The cable was the problem. It was an output cable not input. I soldered the wires to the opposite pins and it works as it should.
also, I followed the instructions for the List button and that worked too. Oddly the A.Mem button on longer shows A.Aux, it now shows A.Tape. Any tips on how to change this?
Thanks, by the way, for being a great resource! I live in the desert area of central British Columbia in Canada, where no-one has even heard of this equipment, so to have access to an international team of experts from multiple time zones is pretty nice