I have a pink 2nd generation iPod... for some reason I can't open my iPod on the computer I have itunes on my computer but when I plug my iPod into the computer and open up itunes ti can see that my iPod is plugged in and for that reason I can't add or delete any songs on my iPod...

Do you mean it *can't* see that your iPod is plugged in? If so, you might try resetting it as described here. If this doesn't work, let us know what computer you're trying to use with your iPod, whether you've changed computers recently, and the operating system (Windows XP, Windows Vista, Mac OS 10.5, etc.).