iCal does not react.

Hi. This is my first post on this forum 😉

Few days ago I changed the disk in my MacBook Pro Mid 2010. I cloned it using Carbon Copy Cloner. Everything seems to work fine except iCal. It does not freeze but I can't do anything in it. Can't add or delete an event...when I try to do it I get "the magic ball" and after a while I can see this message:

" There was an error saving calendar data. Calendar encountered a critical error while saving to the database, and recent changes may be lost. More information may be available in the console."

I'm not familiar with Console. Shoud I copy/paste any message from it and post it here?

iCal also does not synchronize with my iPhone via iCloud.

Any sugestions?