I'm having a similar problem, I'm using Sony DRD+R, 120 min, 4.7 GB ver 1.3.
I put the disc in, and it says the whole Reference point not found thing.
However, when I put in a blank CD-R, that works fine (but the CD doesn't have all the space I need to burn the whole movie I want)
So before going out and buying new discs, any help?