I can't play!

Hey guys, i was playing this like 5 mins ago, now i clicked "launch" button again, but it says that i need to install Silverlight, i already have silverlight, but ok, i click "install", but when i want to install it says that its already installed! :/
Any solutions?

That's happened to me a couple times, try restarting your browser or computer. Usually fixes it.

Ah, yes, i already restarted browser now, it works!