isync and ical problem

I have been using ical and sync with my nokia 6630 with no problems for a while, but i noticed recently that it wasnt updating ical with new calendar items from my phone. When i go onto isync and double click on my phone, i notice that the option for syncing calendars is now unchecked. When i try to check it again i get the message

'Do you want to use ical as your calnedar application? Before you can synchronize your calendars, you need to open a calendar application that supports Mac OS X synchonisation.'

There is an option to open ical, even though it is already open, but i selected it anyway and it still doesnt let me check the box.

Does anyone have any suggestions for why this might be happening and what I can do about it?

 

I managed to sort it by reseting sync history