Keybpard doesn't work at lock screen
Running 2009 MacBook Pro on Yolemite.
I was playing about with my Find my IPhone app and locked my MacBook through the app to see if it worked, which it did. But my keyboard won't work to enter the code.
I can't seem to get it unlocked through the app now.
suggestions?
thanks
MacBook Pro, OS X Yosemite (10.10.2)