Nostalrius Begins - Quality wow vanilla realm (1.12)

hello im just writing to you to see why i cant connect from my pc it says unable to connect please check my connection but my connections fine and i have played this server before we out problems and so does my friend who i live with.. please help. Ah found the problem its because my stupid house mate trying using a hack >.< so now it has blocked my ip address out ? Would You be able to unblock my ip address please ? let me know asap....