who has a solution!!

aiight heres the 411, lol anyway---this has been happening to me for the last couple days, and usually at night but ill login in as usualy and join a game, when i leave i get realm down and have to go back and reconnect to the internet to change my ip, so i relogin join another game, leave to go to ng and bam i get realm down again, after a while this can get very fraustratinh, and every now and then when i reconnect nothing exists, i try and make a game tells meit dont exist or its taken or full, and i cant join any game even if i pick from the list, it says it doesnt exist, right now im trying to reinstall the program hoping that will help, but can anyone else think of why or how to fix this problem...