Ok, first thing, update to OS 9.04 or 9.1.
Now, the 8424SX needs a special driver when using Toast 3.57, and its functionality is... iffy.
I STRONGLY suggest you get Toast 4 Deluxe. Apparently Toast 5 Titanium is coming out... but 4 is good.
Its well worth the money.
What kind of SCSI card do you have? When you reinstalled the OS, did you reinstall your SCSI cards software?
What kind of computer do you have? I'm assuming G3/G4 tower. But it could be any tower really... or hell any OWR machine...
Make sure the SCSI ID on the burner is not conflicting with anything else (set it to ID 5 if you're on a machine with only it and the HD/CD on the SCSI chain).
Also make sure, if your SCSI card has more than one port, that the other port is terminated.
I was gonna make another suggestion which I can't remember at the moment... damn, thats happening a lot lately. Report back, and we'll see what we can do.
Cipher13