Can you give us a total desciption of your set up: 1. OS version, 2. what firewalls you have, 3. ram, 4. HDD space available, 5. Connection type, 6. Modem & router brand name & model numbers, 7. Where are you trying to connect from (home, school, work, etc.)?
These details are vital if you want us to find out what your sonnection problem is.

Go here & tell us what happens: http://www3.limewire.com:6346/ It should say test page was successful. If not then we need to find out why.