1st try these that apply to your version:
Fixes for Limewire Re-install Java AND Delete prefs folder. Reboot after re-installing Java.
Can you give us a total desciption of your set up:
1. OS version? (eg: Windows 98)
2. What firewalls you have?
3. ram?
4. Hard Disk space available?
5. Connection type? (eg: dialup, broadband, cable, etc.)
6. Modem & router brand name & model numbers?
7. Where are you trying to connect from (home, school, work, etc.)?
8. What version of Limewire (LW) & Java do you have? (Go to LW's menu Help>About LW...) Will show both LW & Java version.
I forgot to mention ... make sure all previous versions of LW have been properly removed. If Version prior to 4.4 then use the Add/Remove Programs control panel to remove. If previous version was 4.4 or above then under the start menu>Programs>LW there will be an uninstall option. OR find it in the previous version program folder.