1693S Vs 1633 Cd Burning Problem

I just got a 1693s and have burned 3 Music cd’s. They are all having skipping problems. I had a 1633 BSK firmware upgrade and never had problems burning. I’m using Nero 6.6 latest upgrades. I haven’t tried any firmware upgrades with the 1693. Any suggestions?

The 1633S is a better CD burner than the 1693S.
Starting the 1653S Liteon has broken the string. If you want the same CD burning quality you need to lower the speed under 40X.