Can I play DVD+RDL on Sony DVP-NC685P?

[Homebrew101]

I have a 1 month old Lite-On DL dvd burner with the latest (July 2006) firmware updates. I have burned a DL dvd which plays OK on the Lite-On on my pc but when I put this in my approximately 3 year old Sony DVP-Nc685P stand-alond DVD player I hear the audio on the menu but I have no video at all.

Is this just because the Sony cannot play a DVD+RDL?
Is there any way to update the Sony?
Is my only option to get a new dvd player (which ones would play this) or not use DL and burn on 2 DVD5 discs?

[Krispy Kritter]

Sounds like an authoring error.

Players that cannot read a given media will usually eject the disc and/or give a no disc / invalid disc message.