i have tried using other ethernet cables but they wont work either. My other computers use the ethernet cable just fine, so its just this one, btw im using wireless right now but i would like to get my ethernet cable to work as soon as possible!
Is it the cable that doesn't work, or your system doesn't detect it? Try going into control panel/ network/ network connections and disable your wireless connection. Power off your system, connect the cable and power on. Look in control panel and see if the connection gets created. If so, you can then re-enable your wireless. Let us know.
You might just need the drivers for it. if you have windows 7 / vista got to start, type device manger and look for a device that has a exclamation mark. right click and select update driver. i hope this helps.