Boy this one got me in all kinds of trouble.
The problem is this – you develop your Flash CS3 Zinc application and everything works fine – you burn it to disk and it throws up all kinds of error messages when you auto launch.
The solution is this – save your application out of CS3 as Flash 8 – open it in Flash 8 and re-export it again. I run Zinc on Parallels running on a macBook Pro so I don’t know if anyone else has ever had this problem. Hope the tip helps!