New player Issues

[Diablo]

Hello I'm new to project99, just spent almost 2 weeks tracking down a titanium so Me and my Girlfriend could play, We both live in same house sharing the same internet connection through a router on 2 seperate computer's

I just got Project99 working this morning am trying to connect to the project99 non pvp server, seems to work until both of us attempts to log in, As soon as she logs in my computer gets thrown off or vice versa, Game seems to be crashing and giving IP blocked errors?? Can we not connect in the same house on 2 seperate computers?? if not that sucks since I was only hoping to play with her.....