Burned .img file - but my DVD-rom says that the dvd is blank

[deepdown]

I have burned .img files onto a dvd, using Alcohol 120%.

The dvd works on my TV/DVD player.

Now, when I want to make a second copy - but I can't.

I have also read the tread;
http://www.dvdrhelp.com/forum/viewtopic.php?t=211198

My powerdvd software reports;
DVD-Video playback graph building failed.

Also, win explorer tells me that there is no DVD in dvd-rom. (?)
(but the dvd is in there, and also contains data)

Suggestions ?

[deepdown]

I use verbatim dvd+r.

Also tried using different kinds of firmware's,
1.B0 5 (1.32)
1.H1 7 (1.43)
1eA1 7 (1.32)

...but neither of them helps to solve my problem. ;(

I can insert an orginale dvd and it plays good.
Also insert other cd-rom, and it works good.