I Cleared the settings and went to to (Menu) > System Setup > Machine Setup > Wakeup Event > Scanner selected off, saved the setting and then when back to (Menu) > System Setup > Machine Setup > Wakeup Event > Scanner and selected on.
This worked, however under “Wakeup Event” I am still not seeing the option for “Button press”.
At this point it doesn't matter, it wakes up if a button is pushed, if it receives a print job, or a request to scan.
Thanks for your help.