You could have simply gotten a lemon, it happens. it could also be media issues. different brands of burners generally have preferences for different media. buy quality media, stay away from store brands bargain brands and anything that says memorex. go with Taiyo Yuden, Verbatim, or Maxell.
Sony Burners are all rebadged Lite on's and they are generally very good and very reliable. BenQ 1620, 1640, and 1655 drives are excellent drives. Plextor is also top notch ( the plex 740 is a rebadged BenQ 1640 and not built by plextor though).
Last but not least check the ide channel that your drive is on and make sure it is operating in DMA2 mode. and not PIO.