downloaded limewire and have shared wirless internet connection, however no "local area connection" because "a network cable is unplugged".

i try to search for audio, but my search button isn't highlighted and therefored can't be clicked. is this the reason i can't search for music to download?

i've checked firewalls and i'm using a PC with Windows XP... kinda new to all this, so please respond in simplest computer terms. thanks!