Can't create polygons, duplicate, etc.

[dtention]

So I've tried interactive creation on/off, made sure isolate selected is off, and nothing is happening. I cannot create objects or duplicate them. I've attached a screenshot of a cube that is supposed to be there, this is the only result that I get? 

** FIXED ** 

I was working on a hidden layer 

[sean.heasley · Accepted solution]

Nice catch!