There's some xtra things to try here:
Fixes for Limewire
Try a general search instead of a particular type of search.
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.)?