Ipod nano shows in my computer but not ITunes
I have a windows xp and I have some Ipod 4s that i want to reset them and sell them. Whenever I connect either of the 3 of them, they all go on a dim screen that says 'do not dissconnect' and I can't do anything on them. If i go to my computer and eject them then I can go through the ipod but it still won't show up in ITunes. It will charge fine, that is no problem, I just can't get it to show up on itunes... Help please!
iPod nano, Windows XP Pro