Panasonic S35

I have recently purchase a Panasonic S35 DVD Player. I also purchased a pack of TDK DVD-RAM discs. I used my computer using Nero Burn Room software and an LG drive to write to the DVD-RAM discs. When I put the disc into my S35 Player it says "Wrong disc type" and rejects it. Can anyone tell me what I am doing wrong.
I have written an ISO Video disc image file and have also tried writting a mpeg2 data file but both give the same result.
I have sent several emails to Panasonic technical support but none have been acknowledged or replied to. I have also telephoned them and logged my problem but 10 days have elapsed and I have had no response from them.
Any help that you can give me to solve this problem would be very much appreciated.

 

It probably works like video cds where you need a bit on the disc to tell the player it's a DVD.
This is normally found on the latest versions of any software, all you do is use a program thats meant to create dvd discs for playback rather than data storage.

 

You have to record in RAM format, otherwise the player won't recognise it.

I use Ulead videostudio to record in RAM format from compatible mpeg files.