First of all read the instruction that were issued to you when you first registered.
Secondly we will need some more details in order for us to help you.
Things like:
Is your internet connection broadband or dial-up?
What operating system are you using?
Do you use a router to make your connection to the internet?
If so-what brand and model number is it?
One good thing for you to do would be to connect your computer to the internet, open Limewire then wait about 10-15 minutes to see if your connection becomes any stronger then. Another possible thing for you to do is to read as many of the "Sticky" links at the beginning of these forums, especially ones that deal with bad or poor connections. Many people have been helped by the information contained in these and then they don't need to post a question here.
Basically though we need more information to help us help you.