Awesome GNOME recognizes my media keys but fails to act upon them

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http://unix.stackexchange.com – I'm using Awesome GNOME. When I log into the GNOME Shell, my up and down volume keys work. When I login to Awesome GNOME, they don't. However, when I go into gnome-control-center to set them, the Keyboard section recognizes them just fine when I go to bind the keys to the volume actions. Basically I think what's happening is that GNOME understands the keys but doesn't have anything running to act upon them. How can I make Awesome GNOME work with the media keys? Note that I'm on Arch Linux, so I'm using GNOME 3.8 and Awesome 3.5.1 Ruby Tuesday. I'm using the awesome-gnome package from Arch's (HowTos)