Toast 5 Wont Do 0 Secs, I'm sure it DID before Options

[Syne Wave]

I have been using TOAST for all my cd burning on my 733 G4, running this under 9.2 However for some strange reason it does not want to work when I choose 0 secs on a RW.
I am sure it did.
I have dumped prefs.
I went to the ROXIO web site and see that they offer an upgrade to make it work on using Buffer Underrun on CD RW's. So I tried again NOT selecting the use of BU - no difference.
All I get is that message which says the connection is unstable, which is shorthand for IT CANNT BURN.
Incidently, when I leave all the secs at 2 it works fine. Only I need that 0 as I have two tracks which run into each other. Aside from cheating and sticking those two tracks into one, I wondered if ANYONE in the Whole Wide World had a similar experience which they managed to fix

[Syne Wave]

It's OK. I know about not setting the first track as the specified seconds relate to BEFORE the track. I admit it took a while until I finally realised that one. But what I have set is track 2 and track 8 of a 9 track album.
I usually set it to DISK AT ONCE.
BTW: I got so fed up with this not working on my RW that I put in a CDR and it burned with no problems. So I am assuming it has something magical to do with RW's. (Spooky)
That stupid message I got is what usually happens when the burn speed is not correct. But in this instance I am only offered 2 or 4 speed from the RW disc info. And it will burn fine - but without a 0 secs between tracks.
I had a really silly thought today - to ask them at ROXIO. But then decided to get a cup of coffee instead.