Automation Panel; Functions greyed out

Hi all,

I’m looking at a track where the automation is all over the place and want to start from scratch so I pull up the Automantion Panel go into Functions and want to hit the Delete All Automation in Project, but it’s greyed out.
What am I doing wrong?
I tried selecting all tracks or selecting all events, but it still stays greyed out. So is Delete Automation of Selected Tracks and Delete Automation in Range within the Automation Panel/Functions.

Cubase 8.5.0 Build 69 (64-bit)

Many thanks,