Page 1 of Tevion DVD-8000 - DVD+R playback problems

I have had a Tevion DVD-8000 DVD player (the one on sale at Aldi at the end of last summer) since the end of last year. I bought it for the HDMI connection / upscaling and the DivX playback. It has been fine until a few weeks ago when I tried playing some of my home produced DVD+R discs (until then I had only used it for original DVDs and DivX files burned onto DVD+Rs and DVD+RWs). None of them play properly. Some play but with substantial break up and some don`t play at all or freeze. All of these discs play ok on my PC and in the other players around the house (Mico DVD Recorder , PS2 , Xbox and Bush TV/ DVD combo). I have used various types of DVD+R and rewriteables with the same results. The curious thing is that using the same type of discs to burn DivX files causes no problems.
I have a Liteon DVD recorder in my PC and the discs are burnt using Nero.

Looking for advice. Will a firmware update help? Are there any settings on Nero I could try?

Any help welcome :)