Basic Crontab setup

I can't seem to get my bigip to run a simple cron. Below is the script run

config_sync_script.py

!/usr/bin/python
import os

failover_status = os.popen("b failover show").read().split()[1]
sync_status = os.popen('tmsh show sys config-sync | grep "Status"').read().split()[1]

if failover_status == 'active' and sync_status == '1':
        os.system('tmsh run sys config-sync')

    config  ls -la | grep config_sync_script.py

    -rwxr--r--  1 root   root           274 Aug 13 09:06 config_sync_script.py

    crontab -l
    Active] config  crontab -l
     cron tab for root
    1-59/30 * * * * /usr/bin/diskmonitor
    18 9 * * * /config/config_sync_script.py

The time just matches a time I was working on it. In monitoring the cron log nothing happens and the script never seems to run. What am I missing?