Most connection failures are caused by small errors in typing the user name/password or host address. Checking these and making corrections will usually resolve the matter.
Your FTP access to the web space may be blocked
This is most commonly due to a billing matter or an error in the permission setting of that account, please contact firstname.lastname@example.org to have the matter resolved.
Invalid FTP user name/password entered
The user name/password is case-sensitive and will affect the connection if entered incorrectly. Go back to the FTP Account page in the configuration menu and copy/paste the details. There should be no problem in accessing your web space.
- Incorrect host name in the setup of this connection
If you have registered the domain with 1&1 check if the domain is ready. Please note that domain registrations take a minimum of 24 hours.
Make sure your domain is pointing to 1&1 name servers.
Transfer of Registrar
Make sure the domain has completely transferred to 1&1.
For additional information, you may want to reference: