My ipod touch does not sync with Outlook any more. Can you help?

For over a year I successfully synced my with my iPod Touch 4th gen. with MS Outlook 2007: Calendar, Contacts, and Notes it has been some time that it no longer syncronizes the data. I began backing up my ipod to the cloud last spring. is it possibly related? What else should I check for. My music syncronizes as it should. It is just Outlook that doesn't. Thank you for your suggestions.