The Kreepy Krauley when hooked up to the vac plus II, the Kreepy Krauley, the machine plusates but will not move. However, when plugged directly into the suction ports, the Kreepy Krauley operates at full operation. I have replaced every part the hose adapter, value cap, value locking bar 71/4" plate and the 81/2" adapter ring. I have used the old parts and new parts. With the same result. I had a pool repairman out here and he was just as baffled. Attempted to replace and install of the parts. We attempted to add the parts, but none of them work unless the Kreepy Krawley is pulled directly into the suction port.