i want to creat a server so my friends can join too (listen server), but when i creat it it wont show up on the server list i dont kno what to do can someone help me plz : )

If you are behing a router you will need to forward the server ports to your PC.

how do i do that and i am behind a router

login into your router and find where you can forward ports(check the manual)....
check this guide for what ports you should forward: http://www.vadakill.com/nsguides/advanced/portforwarding.php ( thanks vada)

thanks man : )

ok i did all that i forwarded the ports but still no connect i read that i need to do something with WON....again i wanna creat a listen server thanks