[CRASH] Loading Screen does not appear

Hi guys ! I think i may have a problem with the loading screen which won't appear after i choose a champion in the champ select. I did some screen shots so you can have a better look at this issue.

1. At first: the game has to load, but nothing happens, as you can see. This window "Game is still in progress..." remains there since the end of the match. http://imgur.com/9Mbz27L

2. I try to relog and reconnect http://imgur.com/ZfmlIwv

3. The reconnect window dissapears, but again, the loading screen won't open. Still, the Riot icon is avalable in the task bar. http://imgur.com/oxv5mgX

4. When i click on the Riot icon in the taskbar, this happens: http://imgur.com/o8LQHmh

Can anyone help me about this, please? This thing started bothering me yesterday, when i did the last patch update.