What was the original DVD? A normal retail DVD?
How did you make the copy of that original DVD?
Does the original happen to be copy-protected (using some DRM scheme)?
What format has the file on the hard disk?
What format did you burn it in?
What burning program did you use?
Where do you do the viewing? Another PC, a regular DVD-player? If a PC: what OS?
What exactly do you mean with "only once burnt"?
What exactly is "one of the concerts". Is it one DVD with many concerts, only one of which misbehaves if you burn them all to the same DVD to match the original?
Did you try a direct DVD to DVD copy using your burning program?
I have a dvd that is copied to my computer, and now I tried burning it and everything is perfect, except one of the concerts has video but no audio? Is works fine when I play the files on my computer, but only once burnt. I tried burning it a couple times, but the same thing happens.