Calendars will not sync using current iTunes (Mac) and iPhone software

Since the newest update to iTunes (Mac) 10.5.3 (3) my iPhone will not sync my calendars from my iPhone (5.0.1).  This is a huge problem considering I am out of my office most of the day, and rely on my calendar to keep me in the right place.  For the last week I have had to manually enter events on both my iPhone and my computer.  My computer is older and does not allow the operating system Lion, so I am running Snow Lepord OS 10.6.8.  Therefor, I can not use iCloud to sync any of my iPhone information.

I finally found how to reset SyncService history through the Terminal port.  After I did this it all started to work correctly again. 
http://support.apple.com/kb/TS1627
Thanks for all of your help.

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