When i'm trying to make a team the game crashes.
I'm using Windows Vista Home Premium and i have the newest patch.
I'm running it as admin and win 98 compability mode.

So how could i fix this?

Processor: AMD Athlon(tm) 64 X2 Dual Core Processor 4200+ (2 CPUs), ~2.2GHz
Memory: 2046MB RAM
Video Card: NVIDIA GeForce 7650 GS
Sound Card: Kaiuttimet (Realtek High Definition Audio)
Operating System: Windows Vista™ Home Premium

A workaround would be to use an external team editor.
http://worms2d.info/TeamED