Kathryn Skeltragor

I have uninstalled and re-installed the second life viewer several times. I have tried to use the Phoenix viewer. I have deleted my old objects/ clothes and cleared my cache. I have created a new username. I have even gone back to version 3.2.0.2. But nothing works. Everytime I try to teleport it just says "unable to connect to region, you have been logged out." I use a MacBook Pro. Any advice?