Completed all of this and I still get the same error referencing iRite.
It stops after adding the Show Region behaviour to this line:
Registration completed successfully, please log in to access the site
Which is interesting, because I am not creating a registration page.
Form Builder 1.02
Menu Writer 2.06
Security Assist 2.05
and several others from other vendors.
I am using DW CS6 on Windows 7.