Hi all!

I'm following one of the tutorials that come with Maya (the helmet).
Actually I have to bridge 2 figures (the helmet with the jaw protection) but every time I try to do that the two parts don't bridge as they are supposed to do:
the edge at the bottom of one piece joins the edge on the top of the other generating a cross of poligons.
I've tried to bridge just one edge, but maya flips the right side with the left side... I don't really know where I'm wrong.
Can anybody help me, please?
Thanks in advance.