Here are the instructions: http://www.toodledo.com/info/help.php?sel=41Sign in to your Google Calendar page.
Look at the URL. It will be something like "www.google.com/calendar/hosted/yourdomain.com/render".
Delete everything that is after the word "render" and replace it with "?cid=http://www.toodledo.com/widget/googlecal.php".
Hit return and click "Yes".