Hi
Can't really say why its not working as these are the settings I use except I use PAL. I assume you have set the PAL/NTSC to the correct setting for your area.
Have you tried to explore the DVD to see what has been written to it? There should be a VIDEO_TS folder containing VOB and other files. Perhaps somebody else out there has an answer.
Failing that and you still can't get it to play...
If you have "Windows DVD maker" or "Sothink Movie DVD maker" (Free,) you could resave your film to your PC as an avi file and then create your DVD with one of these programs. As its a DVD-RW it will be automatically erased before the save.
Browse to a suitable saving destination.
Click the Preset down arrow and select HD 720 (or any other suitable format) Output format will be avi.
Click the Framerate down arrow and select PAL or NTSC as appropriate for your area.
Under "Encoder Options" select MP3 Native for the sound compressor.
Click OK
Click OK
VP will render your avi to your selected folder. If its a long video it may take some little time.
Once it is finished you can open WDVDM and load the avi, choose a menu etc. (The Sothink free version is similar)
The resulting DVDs have always played for me even on different players.
Nat