The problem has absolutely NOTHING whatsoever to do with the use of DVD+R DL media. NOTHING. I repeat, NOTHING.
Did you use Verbatim DVD+R DL? If so, were the discs made in Singapore or India?
What is the rated speed of the DL discs you're using? What speed did you burn them at?
Does your burner auto-bitset DVD+R DL to DVD-ROM or did you manually bitset the disc to DVD-ROM?
What is the model number of your burner and what firmware version does it currently have?