I recently recieved an Inspiron 2200.  Tried getting onto the internet at home, but it couldn't detect a connection anywhere.  I have no knowledge of wireless connections whatsoever, or laptops, for that matter.  The computer was supposed to come with a wireless card (is that what I need?) and in the slot for the card is a plastic piece.  I don't know if that's a card, or just a piece of plastic to keep the slot from getting dusty.  Is that what I'm missing?