I recently bought a wireless modem with the understanding that I could hook up my broadband cable to the modem and then wirelessly connect to the internet with my pc. I've been unable to connect wirelessly and have had to connect via ethernet. My PS3 and my Wii have connected wirelessly with no problems. Do I just need to add an antenna to my pc or can I not connect wirelessly with my pc? What do I need to do to connect wirelessly? Thanks for the assistance.