I've burnt the following with no problems:

Datawrite -R (red) @ 4x
Grade A -R (orange) @ 4x
Mirror Platinum -R @ 4x
Mirror Platinum Pro -R @ 4x
Unbranded G04 (silver) -R @ 4x

I'm unable to burn the following:

Discplanet +R (white)
Grade A +R (lilac)
Bulkpaq +R (sliver)

The 107 seems to dislike +R disks! Is this normal?