Hi, somewhat strange as the latest firmwarefor this drive I came across was in this link http://forum.rpc1.org/dl_firmware.php?download_id=2054 try freeing up some memory by closing down some processes that you do not need while burning burning too close to the edge try running your file through nero recode2 and select target output to fit onto a dvd-5 (retail blank dvd). excerpt above was borrowed from gwendolin...try running the nero cleantool from that link, reboot and install version 7.0.8.2. Someone else will come along and pick up a few things I might have missed but use the suggestions I pointed out so far and let us know how it is going with getting you up and burning.
Try and up your burn speed you are trying to burn a 16x disk at 2.4x, which is too slow. Try it at 4x. I would also say there is some recognition problem with these disks, judging by all the "Queue again later" errors. Have you tried any other media, maybe 8x write speed.
You are still using the 16x media, try another brand that has a lower write speed. You are having a hardware error. You are not alone in the problem with this drive here another thread with same thing happening. http://forums.afterdawn.com/thread_view.cfm/341603 Have you tried another burning sw to elimnate whether it is the drive or Nero that is causing the problem.