I have used Disketch successfully - in May of this year, to print onto a CD. Same version of Disketch, same printer, and same OS - macOS Sierra.
There seems to be a breakdown between the Print command and the summoning up of the Print Dialogue. There is no choice to select the CD tray (labelled 'J' I think) rather than either of the two paper cassettes. Anyone else have this sort of problem?
What's mystifying is that it worked 6 months ago.