Can't connect to Pulsar dome over ASCOM

I see a similar post here:

https://forum.starkeeper.it/t/dome-issue-with-skyroof-ascom-driver/707/5

But I’ve kept the pulsar dome s/w open at the same to no difference. I’ll check the COM1 exists - the actual pulsar software is connected via USB. I’m no Windows expert!

UPDATE:
COM3 and 4 exist as USB Serial ports. So there is no COM1 as such. The Pulsar dome s/w connects from the USB of laptop to its control box via USB.

Is there a way to force Voyager to do that?

UPDATE: Thinking out loud is the way to go!

I changed the COM port to 3 on the ASCOM driver on the setup in Voyager and hey presto.

All working!

It’s warned me about the driver not give me the longitude so beware meridian flips - perhaps there’s an option to fix your longitude? It was in reference to the dome - so surely that’s a fixed number?

This looks good software!