Saving Pre sets

I can’t save any vst plug in presets,when I make a change, it’s so frustrating I can’t believe it
A- Insert a plug in on a audio track, tweak the plug in settings .use menus in plug in header to save setting and it won’t let me save
Something that should be so simple,is wasting so much of my time,I’ve read the manual etc,still no luck
it doesn’t matter if the plug in is vst 3 or vst regular
Any help would be appreciated

My system
MBP i7 Quad Core,16 gig ram
Mac OS 10.9.5
Cubase pro 8 v 8.0.20