[ubuntu] VM doesn't detect USB (Iphone)

Hi all,

Host Ubuntu 14.04
Guest Ubuntu 14.04
Oracle VBox

VM is unable to detect USB which is connected to Iphone. Following document can't work;
My iPhone USB Is Not Connecting to Virtualbox
http://www.ehow.com/info_12197214_ip...irtualbox.html

Iphone is not shown up on "device"

Please help. Thanks

Regards
satimis