Dark edge problem in Maya?

bloodmoon

Ok, today I stumbled on a new problem in Maya when polymodeling. When I extruded an face the edges of the face got dark. (see pic) Tested to harden/soften the edges but it didnt do any difference.
Any tips on what I've may have done and how to fix it again?



Thanks a bunch in advance.

serialkiler

go to normals and set to face should work.

bloodmoon

Thanks that did the trick.