Itunes does not recognise my ipod,its a 5th generation 80 g classic.as result i cannot put mp3 s from my laptop into my ipod via my itunes.its the latest itunes.when i bring up the apple logo on the ipod and go to disk mode,the ipod says disk mode ok to disconnect.

Please note that ipod's generally uses itunes to load songs. Make sure u have an updated itunes installed in your system, after that, what you have to do is open the music folder of the songs u want to load and also open the itunes with your ipod detected, then simply drag from the music folder and paste in the ipod of the itunes. Once again, you need an itunes to be able to access and load your ipod. Goodluck.

I found this article on apples web site I thought it might be helpful

http://support.apple.com/kb/TS3218

You will have to connect it to your primary computer (The one with your Itunes library) Via USB, open Itunes and synchronize. That should unlock it.

JVC KS-PD100 iPod Interface Adapter (257KSPD100, sold separately). This optional iPod Interface Adapter supports audio playback for the following iPod models - iPod click-wheel (3rd gen), iPod photo (4th gen), iPod mini (1st/2nd gen), iPod nano (1st/2nd/3rd/4th gen), iPod video (5th gen), and iPod classic (80/120/160GB). The KS-PD100 is not compatible with the iPod touch (1st/2nd/3rd gen), iPod nano (5th gen), or iPhone (2G/3G/3GS). This iPod interface will also not charge the iPod nano (4th generation). *Apple firmware updates may change functionality results.

There u go.....

send it back to apple.
your ipod has a bug sad to say.

in itunes click the ipod and click the content you want to sinc like music the there will be a menu you can choose what you want to be sinced

Format it and reinstall/sync with itunes.your folders have been corrupted some how.RICHARDM69 

95% of the time, when you get the sad face or now on the new 6th generation classics and 3rd and 4th generation nanos it's a cross, it means that you have a faulty hard drive. You can buy hard drives for reasonable prices on ebay. You'll be looking for a Toshiba MK8010GAH if you're using a 5th generation iPod video, and if you're on the 6th generation classic you'll be looking for either a Toshiba MK8022GAA or a Samsung HS081HA. The Samsung's are more reliable.

I have the same ipod and had the same problem - I ignored itunes and the computer and went to "real player" and treated it like an mp3 player and in real player you pick your music you want to burn to a cd but go to "device" column and change the destination from burning to your internal cd burner to the external drive which is the ipod and it downloaded perfect! hope this helps

To reset an iPod with a Click Wheel, including:

• iPod nano (3rd generation)
• iPod classic
• iPod (5th generation)
• iPod nano (2nd generation)
• iPod nano
• iPod with color display (iPod photo)
• iPod (Click Wheel)
• iPod mini
• iPod mini (2nd generation)

1. Toggle the Hold switch on and off. (Slide it to Hold, then turn it off again.)
   
2. Press and hold the Menu and Center (Select) buttons simultaneously until the Apple logo appears, about 6 to 8 seconds. You may need to repeat this step.

Tip: If you are having difficulty resetting your iPod, set it on a flat surface. Make sure the finger pressing the Select button is not touching any part of the click wheel. Also make sure that you are pressing the Menu button toward the outside of the click wheel, and not near the center.
If the above steps did not work, try connecting iPod to a power adapter and plug the power adapter into an electrical outlet, or connect iPod to your computer. Make sure the computer is turned on and isn't set to go to sleep.