Sent from my Nexus 5 using XDA Premium HD app
I haven't been able to get it to work either but I found a workaround
Download the app Shake from the Play Store. App icon is a phone with two blue arrows rotating.
Download OClock from the OStore
Disable the lock screen option from Slide to None. Found in Settings -- Personal & Accounts - Security
Open the OClock app and select a watchface
Open Shake app and configure, here's my settings
Action when shaken - Simple - Run an installed app - Selected Oclock
Sensor sensitivity 16
Check Start at phone start up
Check Active when screen is off
If you want the Omate to sleep faster after a shake to wake, change the Display timeout in Settings - Device - Display - Sleep
Hope this helps.