Went to charge it for 1st time, light wont turn red.

So I bought a two wheel segway and after a great deal of time, it finally arrived. My friend and I rode it all day yesterday and had loads of fun. Naturally the segway light blinked red, meaning it was time to charge it. I pulled out the new charger (MODEL: Hk-42-2000 INPUT: 100-240VAC, 50/60Hz, OUTPUT:.42V) and the light stayed green. According to the the instructions, the light is suppose to turn red when charging and turn green when fully charged 2-3 hours later. So I tried many different outlets and tried switching the plug in pieces different ways and still had no luck. I left it plugged plugged in for an hour just in case, and the segway said it was dead. Lastly another thing to mention is when I unplug the outlet, the box turns red for 10-15 seconds. What should I do, any help well be greatfully appreciated!!