Sony dwu-14a probs

i bought myself a sony dwu-14a dvd writer.
i can normally burn cd, read them and read dvds. but when i try to burn dvds then the dvd-prog kills my pc. i use nero 6.0.11 and winoncd/dvd 6.0
but when i try to burn a dvd video with adobe encore dvd, then is it works. it gives me a error message like ‘The DVD or CD Device Controller software on your system does not support writing large blocks of DATA. We rocommend that you update your driver to the latest version to get improved performace. click OK to proceed using a reduced buffer size’ can anyone help me??