I took apart my dyson 40 & have a piece left over. Looks like a sewing machine foot & a screw holds it in. Now my Dyson won't pick up, no sucktion. I think the hose in the back that sends the diet to the canister, toggling from floor to hide is affected. Ok one screw left and this hook/foot thing?

I was taking apart the vacuume to fix it and I have one part I don't know how to put back on. I think it has something to do with the hose that goes from the floor head to the canister. Now I have no suctionn from the floor only the hose. Inspecting more the hose right above the red clip (behind the grey piece the red clip screws onto) this hose toglels up& down from floor head hose to extension hose both ending @ canistet. My problem - the hose won't move on its own. Where does this missing piece go?