Unable to copy from Hi8 camcorder to DVD on Sony RDR-VX511

I recently purchased a Sony RDR-VX511 VCR/DVD recorder. I also recently purchased a Sony CCD-TRV138 Hi8 camcorder solely to transfer old HI8 tapes to a DVD format. I am unable to record a DVD from the new camcorder. I am using the correct DVDs (DVD+R that came with the DVD recorder). I had no problems recording a DVD with the one-touch VCR to DVD option. If I record a minute or so of a Hi8 tape it seems to be fine and playable. However, when I record an hour in high quality or 2 hours in standard quality the tape gets to the end. Then the DVD writer displays "INF WRITE" for a minute or so, then it shows "DISC ERROR" on the DVD player display and the monitor says "THIS DISC CAN NEITHER BE RECORDED OR PLAYED". I have tried a few different times with a different disc each time. According to the manual I should not have to finalize disc, and I actually don't even get the opportunity. I have the camcorder plugged into the front jacks on Line 2. Any suggestions? Much thanks in advance.