Be sure to use the Canon TS8000 Series template in the Paper Type setting, then click Properties.
This brings up the settings for your printer driver. I think there are four settings with names like Media Type, Paper Size, Paper Source, etc. Some of these menus may have sub-menus. You need to have it selected for disc printing in all these settings.
If this doesn't help, take a screenshot of your printer properties screen, submit an Acoustica Support Request
, and attach the screenshot.