Recently my iPhone has been very temperamental when syncing calendar events. I've narrowed it down to my Outlook 2011 calendar not syncing with iCal, and therefore not transferring onto my phone.

I've tried a multitude of suggested fixes, such as clearing out iCal and retrying the sync. Also, I've tried turning off Sync Services, closing outlook, reopening it and enabling them, but that made no difference to iCal at all. 

Outlook is up to date, and my iMac is running Snow Leopard. Please, can someone help me? It's driving me up the wall!

Many thanks in advance :)