Trouble joining multiplayer - mission file

[Mystogan 10]

Hi guys,

i have been having some trouble joining any multiplayer server. This is what happens... for this example is was a wasteland map

I click a server and join it

I get into the lobby, I pick a class and click 'OK'

Mission file begins downloading

Finishes downloading and then pauses

Then it takes me back to the server list

So i didn't join

Does anyone know what's going on? I have tried running as admin.

Thanks in advance