Forum:Anyone tried the PVP Arenas on the PC version?

Seriously, have any of you been able to start a pvp match on the pc version? Ok, I am hosting a game with two of my friends. I am inside the Fyrestone Coliseum in front of the bounty board to get the game going. The thing is: I can`t customize the game mode or the weapon choices, it`s all greyed out. I can`t even press the "Ready!" button. All I can do is switch between Two Teams and FFA. I could not find anything useful on the internet to solve this problem. Either I am stupid and overlooked a big red "start" button or the arenas simply do not work on the PC version. Please help or confirm the problem, because on the official board no one answered.