Vista - Starcraft Multiplayer Problem

ok, first i wud like to say that my starcraft game works fine (after fixing many problems) and that i can play multiplayer.

only problem with multiplayer is that i cant create a game for people to join.
it wont show up on the game list but i can still create it.

i made a popular game that i know fills up fast but noone wud join even once after 10 minutes

ive read of many other people haveing these problems but cant figure out how to fix it

one of the forums i read recommended me to this site saying that it was very easy to understand: www.portforward.com

but i dont realy know where to start looking on it, as it is related to ports and such
and i cant mess around with that stuff untill i know exactly wat im doing because this is the home computer and my dad might get mad at me if i mess it up lol

so all in all, i need to know how to fix it the game to where i can create a game on multiplayer

if ya have any ideas or thoughts
throw down a reply