So, today I decided to upgrade my brand new iPod touch 2nd gen from 2.2.1 to 3.1.1. After I upgraded it, my wi-fi refused to connect. It worked perfectly on 2.2.1 firmware. The password is right. It connects to it and says it's connected, then it disconnects is after like 3 seconds. It keeps doing this on and off thing. I tried to reset it but it didn't help. Is anyone else having problems like this? What should I do?