The DC07 WON'T pick up dirt through the brush assembly when the vacuum is in the upright position.
There's a valve in the bottom of the mai body, where the little removeable elbow on the side fits, which shuts off the suction from the beaters and starts the suction through the hose.
Logically enough, I suppose, you won't be able to suck thru the hose UNLESS the vacuum is in the upright position.
Hope that helps.
John, February 2008