You were editing the connections how? With the GUI? What exactly did you edit there? Also, give us more description on what you mean by "nothing has worked", for example describe what you saw on the screen that indicated failure?
I would first make sure that you didn't accidentally disable the wireless with the hotkey on the keyboard (Fn-F2 on my laptop, but every computer is different). If it doesn't work, reinstall the packages that own the files you've edited.
Wireless should work out-of-the box without any need for manual editing and screwing up. Please give us more details on what you were doing. Sorry I can't help more.