(I posted this thread in the supporters forum last week without success so I hope I am not breaking any rules by trying it again in here?)
I had a recent problem with Norton System Works, which required me to reinstall the application. Since doing so I have been unable to FTP using Dreamweaver or Smart FTP.
Norton Internet worm protection is causing the problem. When I turn this off everything is fine. It worked OK before I reinstalled Norton so there must be a setting in there that can be changed to make it work.