It's designed NOT to move while on charge (so you don't drive off with the charger following you around!). It will, however light up, and indicate that it is on charge and can't be moved. After unplugging the charger, if it will not light up, then you most likely have dead batteries that won't take a charge and need to be replaced with the proper gel-sealed deep cycle batteries for you chair. Bost chairs take U-1, Group 22, or Group 24 batteries. You will need to remove the old batteries and take them in when you get the new ones to avoid a core charge, and protect the environment. They will give you a like-size battery to reinstall. Completely recharge the new ones for a couple of hours, and you are ready to go.