Hi -- I just got a 770, and despite having made a number of successful WLAN connections (to free public WiFi and to unlocked networks), I have only actually gotten onto the web ONCE. Every other time I have tried to connect to a web address, I get a box saying "Network problem," followed by the web address. How do I fix this? I've tried -- repeatedly -- getting off the connection and reconnecting, to no avail. Any help will be much appreciated.