I'm guessing your IP has just been accidentally blocked in the firewall, if that's the case then the best thing you can do is just wait for it all to be sorted out. The admins are working as fast as they can to sort the server + database out. We just need to be patient.
Its not really your computer/phone its the servers from sythe.org may be having some problems but sythe is fixing them they be going on for a quite a while now