Sorry you're still having problems, John. I don't know if you are missing a file, -you may be, but that is not what is causing this problem!
What Operating system are you using - XP, Vista, Mac? The message is about being denied access. If you are on XP, are you logged on as Administrator?
If you are on Vista, what happens if you right click the Dreamwever Icon in your 'Start' menu and directly select 'Run as Administrator'?