Just an update...
I think the problem was not having the SBIG Drivers installed
.
I installed the latest drivers, and upgraded to v5.00.201 of CCDSoft.
Unfortunately, I'm geting a new error code now... device not found.
I've joined the Software Bisque forums and tried everything I could find in their knowledge base, so I've lodged a post for help on the CCDSoft support forum...
I'm still hopeful its just something silly I've missed.
Al.