I let my 2007 ZZR600 sit in my garage for a few months (during mostly cold weather) and now I can't start it. The bike has about 1,000 miles on it. At first, the battery was discharged, so I charged it up. Now it clicks once, and then the lights go out. After a few seconds, the lights come back on and I can try again, but it still only clicks once and then dies. I tried jumping it with my car, and the same thing happened. What should I check next? It's not pratical to try to bump start it because my neighborhood is pretty flat and I don't have anyone to help me. Thanks for any help.