I have a Orion XT10g and I get this error when connecting it. There doesn't seem to be a celestron scope connected to com port.
I follow this instructions to connected with no luck, here is my equipment.
XT10G Orion telescope
W7 service pack 1 Dodsonian mount
I downloaded the ASCOM Version today and the driver for my scope as well which is a Celestron 5i/8i.