I think I have found the problem!
I've correct the bug with the first update.
But Kongregate wasn't using the new version...
http://www.kongregate.com/forums/4-game-programming/topics/395083-important-note-about-uploading-html5-games
So this time it should be ok.
Thanks for the help guys!!
And please Tell me if it's still not working.
Can't finish stage 5. In the bottom line, there is no more ennemy, but my soldier keep shooting.
Not sure it is related, but some of my soldier have explode.