I have a problem, I need some help.

So, tonight I decided to update my iPod, the new iOS 4.2.1 (which is as high as my iTouch allows me to go) was looking pretty good by now. So I did. But once my comp. was done updating both my computer software for itunes + my ipod, I required me to restart my computer. After going through all points when I finally tried to connect back to itunes. The iPod was not the same name as I had it and continues to show up as iPod touch instead of my iPod name. Now it won't alow me to backup my data. My original account is still there it just wont connect my account to the newly updated iPod.

Please help.