Perhaps this will help, perhaps not, but does your laptop have a switch on it, that turns on or off wifi access? Make sure that it's turned on.
I have had this same issue once on another distro, (suse I think) and when I switched it back on, everything was fine again. You may have
to reboot for the effects to take place, but I doubt it.
Perhaps even reinstalling the drivers might help. I have that same card on another laptop, and have had no issues with it yet.