How do you get songs you download from limewire into your itunes library automatically?

My music used to automatically add itself to my itunes library after i downloaded it from limewire but then i got the new itunes and it won't do it anymore... How do i get it back to normal?????How do you get songs you download from limewire into your itunes library automatically?
I use TuneUp an iTunes plugin that does it magically: http://tuneup.tellapal.com/a/clk/mdDMv



Hope this helps