[AutopCAD 2015] How do I get the rectangle input box to automatically pop up again?

Hey everyone!

For some reason the little input box no longer pops up when I select Rectangle. It used to say "specify first corner point" and I would type "34 [hit TAB] 60" to start a rectangle at 34,60 then it would say "specify second corner point" and I would type "50 [hit TAB] 50" to make a 50x50 square starting at 34x60.

It suddenly disappeared on me.

Thanks