Imessage not working anymore

My imessage logged me out yesterday 3/30/13 and won't let me log back in, it has always worked for me I have an iPod 5th gen I tried restarting and the time zone thing but nothing, when I go to I message setting it doesn't even give me the option to turn it off imessage it just goes straight to the log in, I changed my password and I creates a new apple Id but it still won't work, my iPod is up to date and isn't jail broken or anything