IOS – iPhone backup not starting

backupiosiphoneitunes

After upgrading to iOS 5, I have some issues with my iPhone 4.
I did not activate iCloud backups, preferring to keep them on my MacBook Pro, but when I sync the phone to iTunes the backup does not start, neither through wi-fi nor by connecting the phone to the mac with the USB cable. It syncs without any problem, but the backup is not happening.
Is there a way to manually trigger the backup?
The last backup listed in Itunes is the one made during the update to iOS 5, and not having regular backups makes me feel nervous.

Best Answer

Try logging out and logging in again. There was an issue with some helper not restarting the right way after the required upgrades, relogging helped me. If that doesn't work, try rebooting.