Very low battery

Your battery is dead and gone. Take it to a technician to replace it.

Newer iPods are unable to sync properly with any program other than iTunes. You will have to use iTunes in order to sync songs.

Look inside the slot that you plug in your iPod, is there an orange piece of paper? If there isn't, then your iPod might have been damaged from something (such as water getting inside) which may prevent it from being recognized by your USB slot. Every Apple product does this and it voids the warranty I believe.

If there is an orange piece of paper visible, try going into "my computer" to be sure it's being recognized by your computer as a whole. If it says "_____'s iPod" then it can recognize it and it is iTunes that is causing the problems. Try a reinstallation and replugging your iPod in and out a few times.

Hmmmm check wit the data cable once.. try using different USB ports els different data cables itself..

- if cable workin fine den try doin a hard reset.. i.e with d iPod plugged in 2 d comp try resetting iPod..

-Els check if ya iPodz getting recognized in iTunes.. if itz gettin not gettin recognized reinstall the itunes software.. or follow dese steps-
1>www.apple.com
2>Click on the tab SUPPORT
3>Select iPod+iTunes
4>Select iPod nano 4 r 5th gen
5>U'l find many divisions as get started troubleshooting n al.. under troubleshooting d 3rd link i.e iPOD DOESNT APPEAR IN ITUNES n follow d steps

-if itz gettin recognized in iTunes n not gettin recognized in comp den follow d same steps til troubleshooting.. under dis go to d 4th link i.e iPod is not recognized properly by computer when USB drivers are not installed properly r out f date..

Try wit al dese steps.. hope sumthin works out 4 u..
If none f dese work den derz another step to it.. may b disk mode step which am not sure f.. try finding out regardin diskmode n may b dat'l help ya..

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

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

I have the same iPod and it works with any version, at least mine does. Try downloading it here itunes.com

that's where I went to get mine. And it worked. Hope this helped!

it's a broken battery, your dock station probably charges through the firewire port and is strong enough to power up the ipod without a charged battery, the USB port alone isn't. if you're tech savy or have a tech savy friend you can use a ipod repair guide that will show you how to replace the battery step by step, or you can go to the ipod repair nyc.

GREAT NEWS!

Get a new cable if everything else works that is your problem
Usually, unplugging, replugging it and then rebooting solves the problem.

your other options are a driver issue..either with the ipod drivers, itunes, or the USB drivers for your computer itself. since your ipod video and psp work fine, you can rule out USB drivers, but that doesn't rule out additional driver problems.

the other option is there's some kind of failure with your ipod..and sometimes if a device starts drawing power before doing any kind of communication with the computer (like when my rockbox-hacked ipod goes into charge only mode) then windows will assume there's a hardwire issue. the best way to determine if it's an issue with your ipods are take them to another computer and see if they work. if they work fine...try uninstalling and reinstalling itunes (back up your music and database) and see if that solves the problem. if none of that solves it and you know the ipod shuffles are good..then your system has suffered from the mysterious driver failure that's plagued a lot of systems. and generally the only real solution is to reinstall windows from scratch.

You should try using a different USB cable and connecting to a different USB port and seeing if the problem persists. If it does, the problem's probably with the iPod's logic board.