Based on your FTP usage, I believe you have exceeded the free service limit. The free FTP service is designed for personal and casual use only. It should not be used with any automatic software or device (such as security cameras - using CameraFTP.com instead).
It is recommended upgrading to a paid account, which starts at only $1.99/month.
To further trouble shoot the problem, please install FileZilla FTP client software, then connect to the DriveHQ FTP server. Check if you can connect. If not, please email us the error message. If you already have a paid account, you can also use proftp.drivehq.com