hi, i wanted to play aoe:2 online, but couldnt, it used to go the screen which said setting up multipayer game and after some time it said:join failed. i later found out that ports 6667 and 1720 had to be open. i have a huawei AmartAX MT800 ADSL modem, i referred to the user manual, couldnt find help there. I checked to see if the ports are already opened, using a software, but the ports were blocked/closed. How do I open them?