fedora 19 usb automount doesn't work

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http://forums.fedoraforum.org – I have the latest fedora 19 with all updates. USB automount has stopped working recently. When I plug in usb stick nothing is happens. It used to work 2 days ago. Please, help me to solve this problem. There is a plugged in usb stick (16 Gb): It isn't mentioned by Disks app. (HowTos)