Please recheck that you're logging in with valid Google account credentials, and a Wi-Fi or 3G connection is available.
In addition, if you have never used Google Calendar before, be sure to login to Google Calendar from Safari or any other computer at least once before using Ichiroku, as this is required to setup your Calendar settings.
In addition, if you have never used Google Calendar before, be sure to login to Google Calendar from Safari or any other computer at least once before using Ichiroku, as this is required to setup your Calendar settings.
