SONY NWZ Walkman not mount in Kubuntu 15.10

[Guest]

when I plug-in my Sony NWZ walkman, it is recognize by dolphin but does not mount.

I have 64 bit kubuntu 15.10 installed.
The error message is :-
(The file or folder udi=/org/kde/solid/udev/sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3 does not exist.)

[screenshot]

http://imgur.com/WlcjoM4

Thanks