What media do you use? Copy and paste the complete MID with CD/DVD Speed. What speed do you burn at? Without knowing all the details, I can only suggest you try known quality media (e.g. Taiyo Yuden, Verbatim, RiTEK) and burn at no higher than 16X.
If you really think Nero Express is the culprit, you can always try Burrrn or Burn-at-once (both freeware). Lastly, Sony burners are often rebadged Lite-Ons so you may want to ask around in the Lite-On subforum.