Kaybee, probably because the other ipods' drivers are already installed on your computer. They may have different drivers.
You need the drivers for your new ipod to be correctly installed on your computer.
You can download them yourself from the ipod website and install them (the advantage of this is that you get the latest release, with bug fixes). Or take your laptop to the apple shop and ask them to check which drivers are on it.
You can open the file explorer, and right click on the "work place" (the tab above your disk drives, can't remember what it's called in english).
Then choose the last menu option "properties" and the tab "hardware"
Click on button "Device Manager" and you will see all the installed hardware components on your computer.
If you see the name of your device with a yellow triangle and exclamation mark by it, there's something wrong with the driver.
If you see something like "unknown device" thats also an indicator that the driver is not functioning, or not present. Also if you don't see anythign at all like your device. Try plugging and unplugging hte device if it's not obvious, you should see its entries appear and disappear.
If your device is correctly listed, with no yellow triangle, then it could be a firmware problem on the device, fixable by a complaint, or by a firmware upgrade (easy). But my guess is a driver problem.