The server encountered an error processing registration. Please try again later.

Hi, I'm sorry for my english, but I can't use iMessage. If I try to login via my apple ID, I get an error message: "The server encountered an error processing registration. Please try again later.". I try everythink I find on this forum (reboot in safe boot, delete plists, change time or change apple ID). I use iMessage on my iPhone 4S and iPad and it's works good, but on MBP it isn't work. Please help.