Difficult to know without more details what's wrong. It could be an isp provider using a p2p sharing filter program. It could be that your LW prefs are corrupted, it could be a no. of things. The search results are shown at top not the bottom for a start. Perhaps what you're searching for can't be found.

Try deleting your LW Preferences folder whilst LW is closed; instructions here: Fixes for Limewire