Sounds like the preson before you got the ip banned Hazards of multiple-user comps I guess Try hittin the cafe first thing in the morning and ur chances of bein banned wont be as great
When I had dial up as a back up when my DSL went down, I could not get into chat whatsoever.. for some reason it wouldnt let me in it said the same thing that I had been banned from there.. so what I did was went to different chat sites to see if I would have the same problem and it said the same thing that I had been banned.. damn i made my rounds in order to get banned from all of them but as soon as my dsl was back up and running things was fine i was let in,,,,