PrMumble has stopped working

[Xiandros]

Hi everyone, i just downloaded the game but i noticed that the voice chat wans't working, so i tried opening PrMumble from the launch menu but it says that it has stopped working.
I am running the game on Windows 8.1 x64 and i have also already tried to set the program running as administrator and in compatibility mode with XP SP3.
Thanks in advance for your help.

-UPDATE-
Ok, I tried running in win98/me compatibility mode and it works, but i still can't see the pr server, all i can see are country flags.