Beanstalk5000

I was trying to game with my friend for the first time and we both got the same patch and every thing but my problem is resulting after we log into XWIS ISP we cannot start a game together it says that one person is missing when one of us hosts its really getting anoying i dont know if its a router problem but iv been trying this all day today and yester day if any one has any resolutions it be nice to know THX