ERROR 407 is my problem when trying to access the internet through the firewall. I can get onto the net with IE using the Username and Password in the HTTP Proxy Preferences but even then IE comes up with errors. Other browsers do not have this feature as they rely on the Network System Prefs. This also causes problems with MSN Messenger. I am new to the office and so far the only Mac; the IT department doesn't have a clue. Please help this lonely Mac user.