X Mirror Does Not Work

I’m following along with a blender tutorial and my X mirror isn’t working. For this to work correctly there needs to be an exact X-mirrored counterpart through a symmetry along the local X axis, as said here. http://wiki.blender.org/index.php/Doc:2.6/Manual/Modeling/Meshes/Editing/Basics/Mirror

I have snapped to symmetry, symmetrized and made sure the X mirror option is checked. What part am I missing to let editing work symmetrically on both sides of the x axis?

FigureHeroBacked.blend (1.37 MB)

Your object is not symmetrical, see the position of the object origin, it’s not on the centre line of the object

Position the 3d cursor at the world centre (Shift+S / cursor to Center) then move the origin to that location with the Set Origin options in the toolshelf (object mode)

This worked! Thank’s so much Richard.