rsnapshot syntax OK interval not

Hi

I am planning to install "rsnapshot" before I continue is this a good 
incremental backup program?

I have uncommented the 1st, hourly, and 2nd, daily choices some results, 
any suggestions? Thanks. a

RESULTS:

rsnapshot encountered an error! The program was invoked with these options:
/usr/bin/rsnapshot -t weekly
----------------------------------------------------------------------------
ERROR: Interval "weekly" unknown, check /etc/rsnapshot.conf
root@alap:/home/a# rsnapshot -t daily
echo 6300 > /var/run/rsnapshot.pid
----------------------------------------------------------------------------
rsnapshot encountered an error! The program was invoked with these options:
/usr/bin/rsnapshot -t daily
----------------------------------------------------------------------------
ERROR: Interval "daily" unknown, check /etc/rsnapshot.conf
root@alap:/home/a# rsnapshot -t hourly
echo 6301 > /var/run/rsnapshot.pid
----------------------------------------------------------------------------
rsnapshot encountered an error! The program was invoked with these options:
/usr/bin/rsnapshot -t hourly
----------------------------------------------------------------------------
ERROR: Interval "hourly" unknown, check /etc/rsnapshot.conf
root@alap:/home/a# snapshot configtest
bash: snapshot: command not found
root@alap:/home/a# rsnapshot configtest
Syntax OK
root@alap:/home/a#