Nero 5.5 is driving me mad !

Last weekend I was happily burning VCDs using Nero 5.0 and playing them in my Sony DVP-NS400 DVD.

Then I upgraded to 5.5 and tried adding a VCD menu, and *assumed* that the menu was stopping my VCDs working. The Sony reports C13:00 Dirty Disk.

I have just realised that it's not only the menu, I cannot write a VCD that will work. Arghhhhhhhhh !

Could I have a simple setting wrong ?

I've got ticks in the following boxes :-
Create standard compliant CD
Use CD-i application
Encoding PAL
File ISO level 1
Charset ISO9660
Relax ISO restrictions

Write method is DAO.
CDRW is Samsung SW408B Bios BS04
I've even tried another brand new CDRW disc, same brand, from same box even...

Please Help !!!
Thanks.