usb mass storage not working

i am using bbxm-ubuntu-14.04.1-console-armhf-2014-10-29-2gb.img in my BBxM revC board.for desktop i m using openbox.I want tto run a GUI , as linux kiosk.
everything is working fine .In my application i m supposed to save result file in externel storage device such as USB Mass storage device,but when i insert usb pen drive
it doesnt get recognized , so i cant save file into it.what to do? ,is there any extra package is to be installed ?.Plesae help

you ever solve this?

I have not tried any of this or searched for the old post, but I vaguely recall there being a post about this long ago, and that it was not automatically recognized but had to be mounted manually?