Network is stoping

[tecdynamics]

The last three months I have periodically every 15-20 days the following issue.
When the CWP system trying to create backups and send them over FTP I am losing the connection with my server
I have to provide a hard reboot in order to come up
I strongly believe that something happening with the backup system.
Please feel free and letme know if you have any sujestions in order to help me
Thanks,
Mike