|Click on my name above in my response and read my "how-to" guide titled "Troubleshooting Wireless Issues"|
From the looks of it, you've performed all of the steps in the guide but doublecheck to be sure. If you have, or do, and still no go, then you'll have to either replace the unit (recommended) or buy a wireless access point and plug it in to your existing router.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.