»Yo guys no kidding but i cannot enter Guildcraft

OMG!! i dont know why whether this is my fault or G but could someone help me with this. I cannot open Guildcraft because there is no guildcraft in my server. Im confused. They say that the GC lobby was broken but GC is back up but i couldn't enter. The last server is Guildcraft but it wouldnt show up. btw i wrote the ip correctly and some other IP that GC used but it would still not work. Thank you