Auto Light Table Problem. Please help.

I was merrily going about animating my scene with no problems, when I began moving my frames around. When I was ready to continue drawing I realized the Auto Light Table didn’t seem to be on. So I clicked it again and got nothing.

I know I must be missing something and the solution is simple… But I can’t figure it out… lol

Please forgive my n00bish ways and assist me.