DVD burning

[Zonda11]

I recently burned a dvd full of .mpeg,.avi, and .wmv files. The dvd was burned as a Data dvd.

My dvd-rom supports the new DVD+R's that I used. In explorer, I am able to see all of my files. However, some .avi files are unable to play using real player, windows media, or the latest Divx player from Divx.com. Is there something I need to download software wise to fix this problem??? I still have the original files on my Hard drive, but I want to get the videos to play straight off the dvd so i can delete them off my HD and save space.

In addition, when I try to play some of the .wmv files off the dvd, windows media player tells me that it is unable to play the file. I have the original files on my HD and they are the exact same(size, etc.) and they work.


So whats going on here?