Problem Formatting DVD+RW

I am using DVD Decrypter:

Since I installed a Plextor 750a DVD writer, when I go to
make a DVD copy on a new Memorex DVD+RW disc it
prompts me by saying " disc needs to be formatted . Would
you like to format dsic now? " I click on yes, and it pauses for
a few seconds as if it is actually formatting the disc, but then I
get this message:

I/O Error
Device ( 1:0:0) Plextor DVDR PX-750A 1.02 ( F:) ( ATA )
SCSI Status )x)2
Interpretation: Check Condition

CDB: 2A 00 00 00 00 00 00 00 20 00
Interpretation : Write (10)-Sectors 0-31

Interpretation: Cannot Write Medium-Incompatible Format

But, if I try writing to a DVD+RW that was previously written to,
it works fine in writing the DVD Movie that I wish.

Is it possible that my new DVD Plextor writer will not perform

This one only needs to be QUICK formatted, but the media is crap.

Avoid Memorex, my advice.

How is it rated? What mediacode/MID does it have?

Try with DVDInfo.