Can't get Second Shape Key Driver to work!

HI guys… I REALLY hope someone can help me here. I can set up a Driver for my first Shape Key. But the second one never works! I’m sure I did something wrong, but I cannot figure out what it is.

I’ve attached my blend file. Hopefully it’s not too confusing, but you can clearly see I have a mouth shape for AH, and that works. But my OO mouth cannot seem to work.

Using Blender 2.78c. Thanks in advance!

Attachments

GreenFace_blendShape_Driver_Forum.blend (545 KB)

NEVERMIND…I misnamed my control bones… Sorry I hope I didn’t waste anyone’s time