Your problem is due to wrong IP on AOM when you host a game with gameranger...
The solution is in this tutorial but if you've ever tryed these tips without success, I can have a look with teamviewer and try to solve it with this remote control software.
I'll be online on gameranger (nick : RageNrOx), contact me there.
For teamviewer, get it here... there's no setup.
The best defence is attack!