It's: "Dis-Engage" the clutch.
It Engages the arm to it.
I'll bet you have too much free play. Adjust at both the clutch arm and at the hand lever, evenly, for about 1/8" slack at end of lever tip.
If still no go, take it off, lay it next to old one. See if it is too long or too short.. Return if way out,
I fixed a stretched hood release cable with a cable clamp. I wouldn't do this with something as important as a clutch, though.