sync calendars in icloud
I'm having trouble synchronizing my iCalendar between my desktop Mac and my iPhone 4S. Preferences for both devices are set to enable iCal in iCloud (or so I think) but items entered in one don't appear in the other unless I plug the devices together. What am I doing wrong? Does it have anything to do with the email address used as my iCloud account? Are there other settings that must be turned on besides the obvious ones? All my software is up-to-date.