OK, for the record, in Step 7 of the instructions for calendar.php, you do it for the FIRST instance of the found code, and not for the second! If you do it for the second, then if you click on the link that is the number of the date in that date's box, you will get an invalid id error message. I guess that sounds confusing...don't worry about it, just do it to the first instance only and you'll be fine.