Still not enough info on either DVD or software. Can you check information in Device Manager? Assuming Windows XP:
Click on "Start"
Right click on "My Computer"
Select "Properties"
Select Hardware tab then "Device Manager"
Click on the "+" next to DVD/CD ROM Drives
What information does it give you about your DVD.
1. Have you tried with Nero, if so what was the result?
2. Have you tried with any other DVD type such as plain old DVD-R?
3. Have you tried just dragging and dropping your files onto DVD icon?
Without more info. only guessing but:
My "gut" feeling on this is that you may be using the wrong type of DVD for your system. There is a choice of DVD formats using either (a)DVD-R / DVD-RW or (b)DVD+R /DVD +RW, your DVD may only take one type i.e. either the "-" or "+" type. Hence my question if you have tried other blank DVD's
EDIT: If you have Nero installed you should find Nero Info Tool in your program files. This tool will examine your system and report quite a lot of useful info including drive capabilities. If you do not have this then it can be downloaded
Click Here. Meant to post this with orig reply