tryed putting it in the startup applications under system preferences?

Put the reference to your script in /etc/rc.local

Tried that and it does not work. If i run the command ./rc.local the
scripts run and produce the correct results.

Make sure everything you reference is via full pathname. Startup
scripts run as root but the $PATH may not be set. If that fails, maybe
you can post your rc.local

Here is my rc.local file contents

#!/bin/sh -e

/sbin/modprobe /etc/modprobe.d/parport_pc io=0xec00,0xdd00 irq=15

/usr/bin/service cups start

exit 0