Problem with TMPGenc Author and DVD-RAM

I recorded Glastonbury on my Panasonic DMR E50 DVD recorder from the NTL Digital Service onto a DVD Ram disc. I then tried to transfer this disc to a DVD -R disc using TMPGEnc Author 1.6. However I got this error:-

The program is a mix of different video formats.
The video compression format (MPEG-1 and MPEG-2), resolution, and
the aspect ratio (4:3 and 16:9) need to be the same within the program.

I have used TMPGenc Author before to transfer stuff from RAM discs before to DVD -R without this problem. Does anyone know why I have now got this problem?

The DVD Ram discs had been used for other recordings so I formatted them on my Panasonic DMR E50 before setting up the recording. Is this anything to do with the problem?

Is there a way I can overcome this problem with the Glastonbury recording as I would still like to get this recording onto DVD -R ?