Cannot burn DVD+RW with PX-708A and InCD

I have been using Nero and InCD for years. I recently bought three PX-708A drives for three seperate PCs.

I can burn CDs, DVD+R, CD-RWs fine. None of the three drives successfully burns DVD+RWs. They begin to burn and then give an error that says that it was unable to burn, and all available packets are used up to protect the data on the disc.

I use WinXP Pro on all three PCs. I have tried with 2.4X Samsung DVD+RW and also with 4X Legacy DVD+RW, same problem with both.

Also after the failed burn attempt, if I put the disc into the drive, it will not allow me to explore the disc. Explorer crashes, and the drive LED continuously glows orange.

Any ideas?