Do not disconnect... nothing worked

try plugging it out and resseting it by pressing menu and the middle button for 10 seconds or something like that the plug it back in to see if itunes detects it

put your ipod in disk mode by following these steps.
press and hold the Menu and Center buttons on the clickwheel. when you see the apple appear, switch your fingers to the center and play/pause buttons.
whena check mark appears plug it into you computer and it should detect and mount.
add music and have fun.

Hi,
Is the music in iTunes gone or just the iPod?

If the music disappeared from the iPod, you probably have 'auto sync'
checked in iTunes and there was nothing to autosync so it deleted your music.

If your music is missing from iTunes there is nothing you can do but replace it and back it up next time.

sorry unless you can get it to set to factory settings then your stuck id take it to a shop or trie some one ells computer if this fails then it a fixit job

thats happened to me before I made a new account on my i tunes and there is no sync on i tunes what ever song you want you click hold and drag to your music list

Install the drivers for your ipod specified. Try changing the USB cord as next solution.
Dont forgrt to rate this

http://docs.info.apple.com/article.html?artnum=304434

i just found this
im about to try it
hope it works :)
xx

Look into the bottom of the iPod where the USB connects. Make sure none of the pins are bent and that there is no corrosion visible. Also, are you using the same cable when you connect the different devices?

hold down the middle button and the Menu button until the apple icon came up on my iPod. At once, the iPod icon returned to my desktop AND on my iTunes window. Works great now. Just like nothing happened.Good Luck!!!!!!!

Try booting it into disk mode. Do this by clicking on the menu and center buttons at the same time. When you see the apple logo, immediatley hold the centerbutton and play button down at the same time for 10 seconds. The ipod should now say disk mode at the bottom and have a check mark on the screen.

Then connect it to your computer, and format it using your computer. To do that click on my computer, then right click on the drive letter assigned to your ipod (should be like drive I: or H: or similar.. Then scroll down to format and click on format. This should reformat the ipod completely.
Once that is done disconnect your ipod from the computer and reset it again using the center and menu buttons. After it reboots, try reconnecting it to you r computer and see if it is fixed.