"Please Help"

Hi I am having trouble with my cable modem. I can connect to the internet and all, BUT Why when I shut down my computer, My modem also goes off. This is very annoying to me and any help on why this is doing this would be much appreicated. Thank you

I'm a little confused about what is happening to you....
are the lights on the cable modem turning off when you shut the computer down? The only reason this would happen is if your power cord to your cable modem is plugged into a power strip or power supply that you are turning off when you shut the computer down.
If the lights are still on when you shut the computer down, then the modem is still on. The only light that should turn off is the one that says 'ethernet' or 'computer link' or something to that nature. When your computer is off it has no way of connecting to the modem.