Hi bia88,
Several people have reported similar problems in the last few weeks. I've developed a diagnostic tool to help us track down the problem - you can download it here:
http://limewire.org/debug/condi.jar
Please double-click the file to run it; it should run in the background for about an hour and exit automatically, leaving behind a condi.log file. Please email that file to my username at limewire dot com to help us diagnose the problem. No personal or private information will be written to the log file.
Thanks,
Michael