Initially, go to LW's menu bar, Tools > Options > Advanced > Performance & disable all options. Command & comma key for mac. See if that makes a difference. IF not then delete your LW prefs folder.

Try deleting your LW Preferences folder whilst LW is closed; instructions here: Point #2 & 3 in Fixes for Limewire (sample image included at bottom of page.), or vista http://www.gnutellaforums.com/genera...der-vista.html or mac OSX Deleting LW Preferences folder in OSX.

Anybody's guess why you are not getting turbo charged if you have deleted your prefs folder, but try that first. You may have too many incomplete files that are hampering communication between LW & your router. Also, sometimes Ultrapeer setting can be limiting for turbo charged. So as suggested, disable that at least initially. I find ultrapeer setting sometimes knocks me off turbo charged connection.