After installing the Photoshop CS6 beta, on first launch you are prompted to sign in with your Adobe ID. The Sign In button becomes unresponsive and you receive the error, "Please connect to the Internet and retry." It may be followed by "Either your computer is offline or the clock on your computer is set incorrectly, causing a connection error. An Internet connection is required. Please connect to the internet or adjust your clock and try again."
You can receive these errors if your computer has problems connecting to the internet, your firewall is blocking access, or if the host file on your computer has been modified.
Please go to the following link if you are having sign in or activation errors: