Mike Kaply posted a news today. "I apologize to everyone - Amazon has a maximum contribution level and we are there (I guess that is good). No more contributions until Feb 20.
That's why people are getting error messages.
We'll work with what we have.
Thanks for your support!
You guys (and gals) are awesome!
Mike Kaply"
It seems that Amazon get to a maximun contribution.
He set up another page to contribute
http://www.amazon.com/paypage/P2JXB7S1QN392Y