Because you were unable to get an Internet connection at first, you may have a bad DNS pool (or cache). There is a way to flush the DNS cache from the command-line by going to:
Start -> Search -> cmd.exe
In the black Windows Command Console:
ipconfig /flushdns
Alternatively, you may try restarting the computer and see if the problem still occurs. If it still occurs you can elect to activate by telephone using the activation mechanism.
Best
Mike