Help with unmount on sleep

[jokerjack]

Hi - really hope someone can help me.. i have just setup sleepwatcher on my Mac mini running mountain lion to unmount my network shares on sleep. This is isnt working and i believe the issue is due to mountian lion sleeping before the script is executed as it runs when i do this with the OS up and running, my script is:-

#!/bin/sh
osascript -e 'tell application "Finder" to eject disks'

would it be easier to write a script to unmount the drives and then send the mac to sleep, i think i can assign a shortcut to launch the script and assign this to a button on my harmony remote. I use this machine as a HTPC and my NAS has a power schedule which is causing errors when the mac wakes up.

Thanks for any help you may be to provide