... Is the message i get whenever i try to join a game on worms 2 online.

I have tried this with several different firewalls, and even no firewall, and cannot find a solution still. If anyone has any suggestions i will be very grateful, thanks.

you using a router? or is the person you are trying to join using a router?

or is the person you are trying to join using a router?
Meaning that the persons you try to join has not properly configured their routers.

vyea im using a router but i dont know how to configure it

Check out this site:
http://www.spadger.uk.ro
It has info about the correct ports you need to forward in your router and/or firewall.

Also note that you need the patch to play online (if your game isn't already pre-patched):
http://w2.team17.com/main.html?page=supp&area=patc&file=1