If you receive a message that states The folder you entered does not appear to be valid. Please choose another.
then please check your username
and that the domain points to a 1&1 IP Address
If you are still unable to connect, please download the registry file located below
for your operating system. To do so, right-click and save the respective link to your computer. You will need to double-click the file after downloaded and allow the registry change. You must then restart your computer
and follow these steps again.
Possible error message