Ok I fixed it myself:
1. ran the System File checker (sfc.exe /checknow) which will replace any
corrupted system files
2. deleted all temporary internet files
3. deleted all cookies
Now both the Edit button is enabled and working.
> My edit button on the toolbar is greyed out, anyone know how to fix it?
>
> It stop working when I installed Office 2003 including Frontpage 2003.