Anyone have a sony dvp-cx850d?

I cannot get many DVD+R media type to work with this changer/jukebox DVD player. Any help would be apreciated. Here’s what I’ve found:

Imation DVD+R works
Verbatim DVD+R does not work
Fujifilm DVD+R does not work
Accu DVD-R works
Imation DVD+RW does not work

Specifically I’m looking for DVD+R media that can be purchased in bulk (ie. Ritek). Any help would be apreciated.

no one?