Does your burner actually burn to dvd+R ,this could be just a fussy drive over the type of media used.
Personally and i think you will find many agree,finding a media that suits you away from rw's and +r's (i find them unreliable) to be a better move.
I tend to stick to Verbatim and Datawrite on all my computers.
You could try a different software such as
Deepburner click here
Imageburn click here