Where and how are you trying to login,
File Manager,
http://freepages.rootsweb.com/fileman/ ?
Using your browser?
Using an FTP client?
What happens? Do you receive an error message? What does it say?
Have you verified your login information by asking PasswordCentral,
http://passwordcentral.rootsweb.com ?
Did you remember your pasSWord is case sensitive?
Pat