Re: How can I reinstall my wireless driver ?
I am afraid you have not given us enough information to work with. Your iwconfig looks fine, except you are not associated with any access point.
my wireless worked very fine until few days ago.
When you click the Network Manager icon to connect, does your wireless interface show up? Do you see your network? Does it try and fail to connect? Does it connect and then drop? Or does it connect and the surfing is very slow?
"Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.