Nostalrius Begins - Quality wow vanilla realm (1.12)

Hello,

I'm playing games all the time and I never experienced connectivity issues. But on Nostalrius I get random disconnects. Sometimes it passes like 3 hours without disconnect. Then it just kicks me sometimes for unknown reason. When I try to log in it either comes to the "Success!" button or to "Help" and "Okay" buttons.
And then I'm hopeless. I sincerely have no random internet disconnects. So I'm wondering if I could provide some additional information, download some add on, use some commands; anything to stop this.

Ty

It just so happen today. My sister was playing on my laptop (wireless), and I was on my desktop pc (connected with cable) and after great amount of time, i timed out and her char was still in game. what the hell :\