Your beater bar is not moving because the gear that it's belt sits on is full of hair, threads etc. Unplug the vacuum. Remove the beater bar cover using a large coin. Remove the beater bar. This will take some patience and time. Remove the belt. The gear should have hair strands etc. wound around it. Remove the hair etc. Replace the belt. Replace the beater bar. Replace the beater bar cover. Plug in the vacuum. Thouroughly clean your carpet as it hasn't been cleaned well the last few times do to the vacuum not working properly. Patrick