Make a note of all your settings. Then 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.)

Next time you open LW, go to Tools>Options>Advanced>Performance & disable Ultrapeer capabilities, and also disable Mojito capabilities.

Go to Tools>Options>Connections & uncheck the option & press apply. Now each time you open LW, let it settle for a few minutes before using. Then go to File menu and choose connect.

Double check your speed settings. Be sure you have not set upload & download speeds beyond what your connection is capable of.