OK, I read this a bit closer now.
Force Keyframe, by default, will only force keyframes on things that already have a keyframe somewhere in the timeline. Holding down the SHIFT key while using Force Keyframe brings up an option window that can key EVERYTHING. This is risky to do.
Have you seen my "keyframing basics" videos. I think one of them , at least, covers that.
In the Screencams link in my signature.