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Open iTunes on your computer, go to Edit>Preferences>Devices, click Reset Sync History. Then try again.
Thanks for the suggestion. It did not work. Get this so plugged my Ipad in and it sync'd the calendar.
Apple needs to get this figured out.
There are some additional troubleshooting steps you can look at in these articles: http://support.apple.com/kb/HT1692 and http://support.apple.com/kb/TS2776.
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