A couple more threads that you might be able to get some tips from for optimising your set-up:
http://www.gnutellaforums.com/showth...5&pagenumber=1 http://www.gnutellaforums.com/showth...threadid=27036
Failing that, & failing having given me answers to the above questions & details about your computer system & connection type, perhaps you could try the Beta instead:
LW 4.1.5 The beta has solved many people's probs.