Just bought a new imac and connected it to my work wireless network through a microsoft proxy server. I can check my work email through the connection but safari does not load any other webpage. I get the message saying it will not load beacause the server has unexpectedly dropped the connection. I've checked all the proxy settings and I'm convinced that they're correct. I have a colleague who is having the same problem and she's using a macbook pro and a wired connection. She still has the same results, work email is fine but no other webpage will load. Any suggestions?