Friend, after some tests I found the following solution, just follow-up the steps bellow:
1.- Modify or add the new crontab command in to the Crontab Manager
2.- Run the following command into the SME console:
[root@server ~]# /sbin/e-smith/expand-template etc/crontab
4.- Validate if the the command is already inserted into the main crontab file
[root@server ~]# pico /etc/crontab
Note:Browse into the file in order to find the crontab that you previously inserted
3.- Restart the crond service
[root@server ~]# /etc/init.d/crond restart
If you want to check if the crontab is running you can use the following command:
[root@server ~]# tail -f /var/log/cron
or
[root@server ~]# tail -f /var/log/messages
P.S. As an example create a crontab that need to run every minute, every hour, every day of month, every month and every day of week, so in the crontab file will appear a line like this:
* * * * * root echo "------------------------" >> /root/bin/tout.tmp
Best Regards.
Eviny