Error 255 on reload

exit: 255
You (asterisk) are not allowed to use this program (/usr/bin/crontab)
See crontab(1) for more information
Unable to continue. Cron line added didn’t remain in crontab on final check in /var/www/html/admin/libraries/BMO/Cron.class.php on line 99

var/spool/cron/asterisk has asterisk permissions
i removed sipstation and dahdi config as they were throwing other errors

You need to switch into the Asterisk user and give it permissions to use crontab. The program crontab. You have it locked down.