Pioneer BDC-207DBK

First off, I have a system with 4 swappable hard drives; 3 with windows 7 x64 ultimate and 1 with win XP Pro x86. I found a peculiar thing; I had win XP in my pc and for curiosity I put a DVD+R DL disc that I burned into the Bluray drive to see if it...

I purchased, through Amazon, 3 Pioneer BluRay recorders. When I connected/installed it to the computer, I was not able to get them to read BD-R BluRays.Verbatim & Kodak BD-R.