faild to sign in

My air droid was working fine whole morning, and it sudenly posted message "faild to sign in" I was trying to restart him several times with no success. I have correct mail and password. What could be a problem?

I think its because their SSL certificate expired today. :\">

Sorry, the server for web.airdroid.com is temporary down. We're aware of the issue and are busy fixing it. The Lite mode (http://192.168.xx.xx:8888) should work without any problem.