Re-install it after running(without the quotes) "rm /etc/rc.d/unraid.d/rc.unraid_sickbeard" in a telnet session as prostuff suggests.
Then after you get everything running the way you want it, just as a suggestion, maybe do what I did, make a script to backup the config and db files on a daily basis. Couchpotato never installs right on reboot for me, and the SAB config gets wiped out on me everytime, but I just reinstall CP and restore those files to CP and SAB and I'm always up within a few minutes. Sickbeard usually reinstalls perfectly but it's good to have a backup regardless since it can be the most time consuming to set up.
Here's the script I made and use
tvbackups.sh
#!/bin/sh
cp /mnt/cache/.sabnzbd/sabnzbd.ini /mnt/user/backups/sabnzbd/sabnzbd.ini
cp /mnt/cache/.couchpotato/config.ini /mnt/user/backups/couchpotato/config.ini
cp /mnt/cache/.couchpotato/data.db /mnt/user/backups/couchpotato/data.db
cp /mnt/cache/.sickbeard/config.ini /mnt/user/backups/sickbeard/config.ini
cp /mnt/cache/.sickbeard/sickbeard.db /mnt/user/backups/sickbeard/sickbeard.db
# done!
Then I added in crontab
30 1 * * * /mnt/user/backups/tvbackups.sh 1>/dev/null 2>/dev/null