server offline but at sister it's online?

[tomi19]

We live in the same house. I can't connect to the server but she is online and she can play. O.o What's this?

[Agatio]

Copy her client to your PC and run it.

[tomi19]

still not working :S we turned off all the firewalls and not even then. What can be the problem?
Again, 2 rooms away, sister is playing :S

[☠EvilTouch☠]

u have teamview? pm me with the id and pass please

[sziget11]

dunno how but it works now O.o we set the graphics on low, restarted computer and now it works.
Thank you for your help <3