NEC 3540A DVD+R Trouble!

Hi,
Hope someone can help me.
I got the 3540A a few days ago, and i cant get it to recognise DVD+R.
e.g when copying a DVD in nero 7, and asks for a blank DVD it only comes up with the option for DVD-r/RW, whereas my brother has exactly the same drive, and it says DVD-R/RW, DVD+R/RW etc etc.
Any help would be vital!
Regards

Because you have Nero 7, have you contacted the NERO support about this??