SL Elements not active with Cubase Pro

Bought SL Elements while I stil ran Cubase Elements. I have now upgraded Cubase to pro and would like to use SL with Cubase. Following manuals i select audio event press extension and can see SpetraLayers but it’s grayed out and not selectable. How to enable it?
NB. SL Elements works fine outside Cubase

Make sure you have selected an audio event, and not an audio part

If that is not the case, please rule out corrupt prefs

Thanks Steve! Didn’t realize that. Yes now it works :smiley: