ITunes could not sync calendars to iPhone because the iPhone disconnected

error message
iTunes could not sync calendars to iPhone because the iPhone disconnected
I have spoken to Apple a couple of times in the last week (approx 2hr) apple support said it could be a Microsoft issue I have spoken to Microsoft and read endless information from the net and it seems that Microsoft is not the issue.
I have uninstalled itunes and reinstalled, reset all settings in Settings\General on the phone, reset sync history on the iPhone, upgraded microsoft office 2003 to 2007 and I am still getting the error message.
I have a iPhone 3G, pc is running windows 7 and just upgraded to microsoft office Home and Student 2007 and Office Outlook 2007.
iTunes version 11.0.2.26
iPhone iOS 6.1.3
I have the same error on my wife's iPhone as well.
Any help would be great.

Thanks midwestcraft. I had this problem and your answer solved it for me.
Thought this further info may be of use to some who wants more historic dates in their calendar.
I had "do not sync events older than" unchecked and the input field set to "0". When I changed it to 180, it worked perfectly. I've found that I can increase this number to "545" - anything higher causes the error. This seems to coincide with some strange multiple-entry events in my calendar.
Don't know if this will be a clue for somebody to fix the issue.

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    Thought this further info may be of use to some who wants more historic dates in their calendar.
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