If you get this message in CPanel when adding/ediiting/viewing the cron jobs ...  
 /usr/bin/crontab permissions are wrong. Please set to 4755 
 This indicates that the OS used on your server has a cron/anacron/vixiecron deployment/rpm that requires provides different permissions to those required by the version of the control panel you are running.
- Login to your server by ssh
 - su - to switch to the root user
 - as per the instruction provided by the control panel, set the required permissions 
chmod 4755 /usr/bin/crontab - restart the cron process 
service crond restart 
this should fix the message display in the control panel.
If you do not have root SSH access (are on a shared/virtual server, a managed VPS or an Astutium Managed-Dedicated server), then please raise a ticket for support who will be happy to assist.
