Well,
First check if you are connected.
If you are then search. If you get nothing, check if
you havent spelled it wrong.
If everything is correct then its probably not avaiblable in
your horizon. I would search for it on different times since then there are other people online.

If you dont know whether limewire is working, just do this
ueberhacker search term:
britney nude
You should get tons of results. If not, then there's seriously something wrong.