Copy keyframe Greyed out

Using mocha 1.6.0 here. The Copy/Paste buttons in the Keyframe Controls are never active, under no circumstances. I can select all points or none, playhead can be on a keyframe or not, it simply is never active. I’ve seen it active in many tutorial videos, but it’s not working here. This is a serious issue!

Probably a simple answer to this, but I am stumped. I am hand rotoing a clip on a layer. I did not track with this layer at all. I am just hand animating the x-spline. I want to copy a keyframe and paste it later but both options are greyed out.

This has happened before but I don’t remember the details. Any suggestions?