Did the LittleShoot install seem to work correctly after you downloaded it? What operating system and browser are you using?
Have you ever gotten any search results for anything at all? What happens if you just search for, say "test" without the quotation marks?
One last question: under "Options" next to the Search button, are all the options checked? You definitely won't get any search results if all of them are not checked. The same is true for the "Video," "Audio" etc check boxes next to the search field.
Thanks.
-Adam