Get an 802.11g wireless card or USB adapter and set it for b/g. It seems like the card you have now is b only, g cards are cheap just pick up one from newegg or something.

10 Wi-Fi configuration tips from Apple for better wireless connectivity, performance Your email has been sent iPhone, iPad and Mac users, increasingly dependent upon wireless connections, can take ...

To access your router configuration page or want to know the Login URL for your router to change settings, you will have first to find the IP address of your router, then open your router ...