backup dvd+r to dvd-r

[g12345567]

I am trying to make a backup of a dvd+r disc
I can successfully create hard disk iso image and burn the iso back to dvd-r
The resulting dvd-r work fine on my stand alone dvd players
But the resulting dvd-r can not be read in my computer anymore.

What have I done wrong? Is there anything special I need to do to backup dvd+r -> dvd-r?

my dvd roms are as follows:
* pioneer dvd 116 dvd reader
* nec nd1300a dvd burner.

[F1118]

Use DVD SHRINK to rip the vobs back to your hd and burn the video ts folder with nero.

[Sifaga]

do you get an error when you try to play it on your computer ?

what dvd player are you using to play on your computer ?

what are you using to make the iso and burn ? (DVD Decrypter ?)

[Vintageman]

Does the DVD+R even show up on your computer? If not it may be you can burn DVD+R but you burner can't read DVD+R ( as the Pioneer 106D ). I discovered after burning a couple of DVD's.