Itunes 12, Mavericks, iphone 6 calender no sync

Hi @ all

I was forced to sync my iphone with iCloud, now I take off the iCloud sync cause it is possible to sync local again but...

-) at the step 3 out of 7 (sync of calendars) the sync process would not go on.

Try since month to get this work again.

Found the same issue with MobileMe and if it was taken off you had to reset the sync services but this is not possible in mavericks.

Anyone who had an solution for me?

Thanks in advance