My iMacs wireless card isn't very good! It connected to my family's wireless network when I had it downstairs temporarily, but now, when it is in my room, IT WONT DAMN WeLL GET A GOOD SIGNAL!!!! I get a good signal with my Winblows laptop, BUT NOT MY IMAC! I usually only get the little dot of signal and when I only have that, I CAN"T SURF THE WEB OR PLAY LAN GAMES AND STUFF LIKE THAT!!!! Bother!! HELP!!!