I am trying to connect my MacBook Pro to a PC with a crossover cable. When I connect the two computers using the cable, my internet browser on the Mac stops working (i.e. I can't download webpages any more). I have tried several different browsers but that doesn't help. The wifi symbol at the top-right of the screen still shows as being connected though. I want the wifi to continue working if I plug in the crossover cable. Any assistance on this would be appreciated.