Cannot write compilation to selected burners simultaneously

vbimport

#1

I am trying to burn a Nero .nrg image file to an Aleratec 4 stack DVD burner but keep getting this error message. The original disk is DVD-R and I have tried Maxwell DVD-R, Verbatum DVD+RW, and now TDK DVD-R.

The image burns to the DVD burner in my laptop. It also burns to the Stack burner ONLY if I select one drive, not 2 drives.

Windows Vista. Nero version 8.

I opened Nero up 4 times, so the program is open 4 times at once. Open Nero program #1 is burning the image to my main DVD drive (drive D). Open Nero program #2 is burning the image to the 1st Aleratec Drive, E. Open Nero program #3 is burning the image to the 1st Aleratec Drive, F. Open Nero program #4 is burning the image to the 1st Aleratec Drive, G.

So I can get the computer to burn the image simultaneously to 4 burners, but only if it thinks that each open Nero program is NOT burning simultaneously