Hey all,

I'm working through the helmet polygonal modeling tutorials for Maya 2010 and I'm stuck on the step were you have to extrude the polygon mesh mouth piece. I select the mesh then go Edit Mesh > Extrude and nothing happens, no arrows or nothing. Even when I select the show manipulator button from the tools side bar nothing happens! Please help me! I really want to complete the tutorial but I cannont advance past this problem. I've attached a screenie to show you what I'm doing. The second image is what it is supposed to look like!

P.S- Sorry for being so green I just started using the program.