Scheduling a cron job in go script

I'm trying to sync files from one directory on my cache drive to another directory on my cache drive.  The code I'm using in the go script is

echo "0 * * * * rsync -a /mnt/cache/apps/downloads/transmission/ /mnt/cache/apps/downloads/complete/tv" >> /var/spool/cron/crontabs/root

but it doesn't seem to work. From my understanding, this should run at the top of every hour.  A short while ago I rebooted the tower 15 minutes before the top of the hour just to make sure the script loaded and nothing happened when the time came.

When I try

rsync -a /mnt/cache/apps/downloads/transmission/ /mnt/cache/apps/downloads/complete/tv

through telnet, it works as expected but I just can't figure out how to make it work in the go script.

Here is my entire go script, there's no much in there though.

#!/bin/bash
# Start the Management Utility
/usr/local/sbin/emhttp &
echo "0 * * * * rsync -a /mnt/cache/apps/downloads/transmission/ /mnt/cache/apps/downloads/complete/tv" >> /var/spool/cron/crontabs/root

Also, if I want to run this every five minutes, would this be the code? (I started testing with this code just so I could see if it would run without having to wait a whole hour)

#!/bin/bash
# Start the Management Utility
/usr/local/sbin/emhttp &
echo "*/5 * * * * rsync -a /mnt/cache/apps/downloads/transmission/ /mnt/cache/apps/downloads/complete/tv" >> /var/spool/cron/crontabs/root