Just received my VIP Plus remote. Unfortunately I can't get it to charge. When I plug it in, the red light comes on but only stays on for about 5 seconds before going off. I thought it might just charge without a light so I left it for a few hours, came back and it was dead. I've tried it with the cable supplied as well as 3 other chargers and no good. Is there something simple I'm not doing? Any help would be much appreciated