I'm going out on a limb here, but since you mention wireless, is it a B43 based chip?
You might be affected by this bug. Basically, try turning on "Proposed Updates" in Synaptic, update Jockey, then trying running Jockey again. Beware that turning on proprosed updates can also update your system in various other ways too, so don't just "Mark all Updates" - be selective. And consider turning it off again once you've updated Jockey. Proposed updates can break your system if you're not careful.
Alternatively, try :
sudo apt-get install firmware-b43-installer
Which installs the latest B43 firmware at the command line, without jumping through the hoops above.
Of course, if it's not B43 related, let me know and I'll delete this answer.