Chance to play Gears Of War with father

HI all and merry..
Ok im have one problem.
Im on match site with my father..We have match IP too.
And we want play game Gears Of War together. But if im try find him (and he host) im cant find him. if im host he cant find me. Any patch,helps or anything?
Thank you.
Answer #1
make it hamachi server
Answer #2
We make hamachi server and join to site but..Dont help.
Answer #3
Make sure none of u 2 have a firewall enabled
Answer #4
Ok we triede disable firewall today but im tink we disabled before too.
Answer #5
Dont help we cant find host too…..Buhehehe..im want play on lan omg.. where is the fuking problem?