Registering & Syncing Ipod Nano 3G

Unlock an iPod Model A1199
Although the second generation iPod Nano (also known as 2G) uses a four-digit pass code that prevents unauthorized access to your iPod by locking the screen, you can also unlock the device by plugging it into your computer's USB 2.0 port.
When the 2G iPod Nano is connected to the computer it is synchronized, and automatically unlocks the screen according to the official Apple site.
In order to successfully unlock the Nano it must be plugged into the primary computer used for synchronizing content.

Click "Start," "All Programs" and "iTunes" on your PC's desktop, or click "iTunes" on the Macintosh's desktop dock.
Plug the iPod Nano's cable into the docking port on the iPod Nano.
Plug the other end into the USB port on the computer to open iTunes.
Click "Controls" at the top of the iTunes' menu, and select "Eject iPod."
The iPod Nano's screen will be unlocked once it is ejected from your computer.

Manual Guide download
http://manuals.info.apple.com/en_US/iPod_nano_2nd_Gen_Features_Guide.pdf
Unlock an iPod Nano Code
With the latest iPod Nano model, you can set a four-digit code and lock all intruders from accessing your iPod.
In order to use the device's functions again, you need to enter the correct code.
However, if you happen to lose or forget the code, you will need to find another way to unlock your iPod Nano.

Plug the iPod USB cable into the bottom of your iPod Nano.
Plug the other end of the USB cable into a free USB port on your Mac or PC computer.
Open the iTunes program by using the Dock on a Mac or the Start menu on a PC.
Select your iPod Nano from the "Devices" list in the main iTunes window.
Click on the "Sync" button to make a connection between your computer and your iPod Nano.
Click on the "Eject" symbol once the syncing process is complete.
Remove your iPod Nano from the USB cable.
The iPod's lock code will now be reset and you will be able to access all features again.
Navigate to the "Screen Lock" option in the iPod menu to lock your iPod's screen again.
Since your iPod's lock code was just reset, you will be prompted to select a new four-digit code.


iPod Support
http://www.apple.com/support/ipod/

Connect it to the computer.
Open iTunes and select the Nano.
Uncheck Open iTunes when connecting this iPod.

Don't have iTunes open when the iPod is connected.

Compatibility: iPod mini; iPod nano 1G, 2G, 3G, 4G; iPod classic 4G, 5G, 5.5G, 6G; iPod touch 1G, 2G; iPhone, iPhone 3G, iPhone 3Gs

Wireless audio system includes iPod Dock/Transmitter and two wireless speaker systems with LCD display and alarm clock function

AM/FM tuner provides alternative to iPod content; multi-zone function means iPod can play in one room while radio plays in another

Expandable system is easy to set up, and is compatible with up to ten speakers with the compatible audio receiver

Connect to your home AV system with composite audio and video cables for enjoying iPod content

Check the pins on the speaker and on the plugin on the iPod, that's the problem usually. Also, check if the iPod is truly compatible, even if it worked before it may not be. I have seen car chargers for say a 2G iPhone work for a bit then say incompatible, it happens. Here are the compatible iPods for the iM310:

Plays and charges
iPod mini;
iPod nano 1G, 2G, 3G, 4G;
iPod classic 3G, 4G, 5G, 5.5G, 6G;
iPod touch 1G, 2G

Good luck!
EJ

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.....

Test the songs that are not playing on the iPod in iTunes and see if the original file is still playable on iTunes if the song still plays re-sync your iPod could be when iTunes copied the song it must have failed or timed out, if that fails re-syncing try restoring you iPod Nano i have had this problem before and I just re-synced and it worked fine!

When you plug the iPod into the computer, a window may or may not pop up, depending on what you told Windows to do with the player the first time you connected it. If the window does not pop up automatically, double-click My Computer, double-click the icon of the iPod, and you should see a folder that says Music. If this folder is missing, that may explain your symptoms. Right click a blank area of the Nano window, and select New --> Folder --> and create a folder named "Music". Try syncing again, and see if it works.

-Tha Mp3 Doctor

yes, unfortunately the ihome iH9 is not compatible with previous models of the ipod nano.

if you want a similar device, there are many other docking stations for the ipod that are ip0 that ARE compatible with the ipod nano 2G

iH85B is another ihome dock which is compatible with all ipods after the ipod mini (including the ipod nano 2G)

http://www.ihomeaudio.com/products.asp?product_id=10186

The newer generation iPods don't always work with the iPod connection kits in a lot of the car stereos. Some of the problem is due to the fact that the new generation iPods have been changed and the stereos were manufactured before the players were released so they are not compatible.
I bought my girlfriend a Pioneer car stereo with an iPod control cable, and it works fine with her Nano (not the new generation Nano) and it works with my iPod Photo 60 GB but it does not work with my iPhone 2G and I read that it is not compatible with the new Nanos or the Classics. Check with Jensen to see if the model you have is compatible with the Classic and see if there is a solution to the issue. It may not be compatible with the new video portion of the Classic firmware.

Cheers

Start with these five simple solutions: Reset, retry, restart, reinstall, or restore
http://www.apple.com/support/ipod/five_rs/