Hokay.
Please post your computer specs. It will help.
You should post your:
-OS: stands for Operating System. Some OSs are Windows XP, Linux and Mac OS X
-RAM: stands for Random Access Memory. To make a long story short, the more of that you have, the faster your computer will go. One of the most common RAM amounts is 256MB.
-Java version: computer language in which Limewire is written. Go to
http://java.sun.com/ to get the latest version (free download)
-ISP: Internet Service Provider. The guys you pay to have Internet goodness at home. Which ISP are you paying?
-connection: what connection speed are you paying for. You can call your ISP to ask them, or just go to Google.com and search "speed test", do a bunch of tests (not just one) and post the results.
-firewall: software that allows you to control Internet access for all programs. It also blocks outside people from connecting to you without your consent.
-routers: the device that you plugged your computer to, to get Internet. Different from a conventional modem in that it also acts as a firewall.
I don't think I can get any clearer than this...