Imessages -_-

Hello everyone.

i Had just recently bought an Ipod 4th generation, 8 gigabyte. I had sooooooo much trouble with Imessages and its just becomming a pain. I open it, type in my Apple I'd and then it will take me to the next screen and then moves right back to the start screen where it made me type in my apple ID. I had bought 2 so far, and each one has done it. its very annoying, I will love you forever if someone can help me 🙂