iPhone 5 does not sync with iCal via iCloud
Here is my problem and it seems to have just started recently. If I make any changes in iCal on my iPhone 5, it does not appear on iCal on my Mac or iCloud. If I add or change anything to either my Mac iCal or iCloud, it then appears on these 2 calendars and the same occurs if I were to delete it, but nothing happens with my iPhone. Therefore, it seems to only be a cmmunication ptoblem between iPhone 5 and the 2 calendars.
Any suggestions?
Thanks