Worms 2 was excellent game (actually still are) until Microsoft's "experts" didn't remember how to make peoples lives much harder. They invented DirectX v9.
People who have this one installed encountering problems when trying to join games. Doors are always closed for them and other people in room are "invisible" for them.
Luckily, some smart guys made this program, which uninstals DirectX v9. Then you only need to install DirectX v8.0 and, if necessary, reinstall Worms2. (don't forget to save teams first :-))
Its also recommended that you read read1st.txt in .zip file. (especially if you running Windows ME).

INSTRUCTIONS for use find here.

IMPORTANT NOTICE This probably won't work with Win XP (Microsoft strikes back).

Many thanks to people who made this excellent software.

Win XP solution is listed here.