[SOLVED] Hosting public matches

Well i need help with hosting. whenever i host a private match hardly any one can join my room since they get unable to connect..., and whenever i host public match when i start with 2 people in party no 1 else joins and usually its an automic join for people. i think its my router if any 1 can help it would be greatly appreciated.

More info:
Router: Linksys E1000
Antivirus: Webroot Antivirus with spy sweeper



help please?

thanks