Are you using FTP? Our FTP servers are working fine. Please email us more detailed information about the problem.
If you have a free service account, please note there are a few restrictions, incl. you can only logon about 20-25 times / day; also you should not connect too frequently as it could result in your account being blocked by our monitoring software.
It is recommended using DriveHQ File Manager., which has a lot mroe and better features than regular FTP.