Usually it is caused by some anti-virus or network security software that blocked DriveHQ client software. Please double check your anti-virus / security settings. You might want to turn off anti-virus for a short period of time to check if it caused the problem.

Our current version FileManager is 4.0; It is strongly recommended upgrading to the newer version.You can find the latest version software at:

http://www.drivehq.com/downloads/downloads.aspx

After you download the new version, please double click to run it. The installer will uninstall the older version, and then install the latest version.