iPod Touch Won't Update Past iOS 4.2.1
I have a 16gb, 3rd generation iPod Touch (purchased September, 2009) that will not update past iOS 4.2.1. I know that the 16gb 3rd gen model didn't get all of the iOS 4 features that the rest of the 3rd gen models did, but I can't find anything on the Apple page about 4.3 that would indicate that some subset of the 3rd gen iTouches would be unable to get the update. I'm running Windows 7 64-bit and iTunes version 10.2.2.12. Any ideas what's going on?
iPod touch, Windows 7