OK I did get this all to work in the end.
First, I updated to the latest Digital Loggers Firmware, I tried the same as Tim Brothers 1.7.11 but that did not work.
I updated to 1.7.16 and the AVR update too and now it does work.

DO NOT USE THE ASCOM DRIVER ON THE ASCOM FORUM if you have a Digital Loggers Pro you need this ASCOM driver with the MOST recent Firmware.

Peter