Brand new nano having trouble updating, maintaining song permissions

Question

My mom got a brand new 4g nano for Christmas. We brought it down to her computer, which is running Windows XP 2003 with update package 3.
We cannot get the ipod and itunes to work together. Here are some of the problems:
- My mom bought two songs from the itunes store after she hooked up her iPod. However, anytime she tries to update, itunes says that the computer is not authorized to play the songs. We go through the authorization process, but the same error pops up immediately after. However, we can still play the songs through iTunes and on the iPod.
- We tried to update the ipod software to the latest version, but about halfway through the update the ipod disconnects. The ipod no longer shows up in the sidebar, but the update progress box still appears. Then an error box pops up saying the ipod cannot be updated and gives the error number 1436.
- I tried resetting the ipod by toggling the hold switch and holding the center and menu key, but when it powers back up it still shows that there are songs on the ipod.
We've tried uninstallng and reinstalling itunes, and connecting the ipod through a different USB port. It is not on a high speed USB port, could this be part of the problem?
Any insight or tips would be greatly appreciated-- we want to help her get this going!
Thanks!

Answer 1

http://support.apple.com/kb/TS1372
Try the steps you haven't in this article.
As for the music problem try fully deauthorize the computer and reauthorize it again. If that doesn't work then try deauthorizing all the computers on the account. Steps for both are in http://support.apple.com/kb/HT1420
The fact that you are not using a high-powered USB ports can be causing a problem, make sure they are at least 2.0 ports.
Also, when you uninstalled and reinstalled iTunes did you follow this article? http://support.apple.com/kb/HT1926
If you didn't then I would suggest it. I've had all these problems separately in the past so I feel for ya.