Roxio: Can't Select Track-at-Once

I am running Roxio Easy CD Creator with all the latest drive updates. I have two drives:

  • AccessTk CD-RW CW1601A

I had no problems with either drive running Easy CD Creator 5 using the same media and same drives.

The problem:

I create a data CD project. With no media in the AccessTk drive, all options for Record Methods are selectable. I insert the CD-R media, and everything greys out except Disc-at-Once. I’ve changed every option I can find, to no avail. I eject the media, the options come back. Using the same media in the IOMEGA drive and everything is fine - all Record Methods available.