Ok, fixed. My antivirus (ZoneAlarm) was blocking Toribash. Badly, I don't know how do I have to do to avoid closing and reopening my Antivirus : I have to close it to play Tb :/
There should be some way in ZoneAlarm to allow Toribash, unfortunatly I have never used ZoneAlarm and cannot help you, try lowering the security settings or find the bit where you can allow applications.