How do i access usb drive Folder bit lost

[avior]

how do I select a mp3 folder on my USB drive which is connected to the raspberry pi, 
 I can select the MP3 Folder  via gui which  all works fine.


I have now just put a apple remote to it and volume up and down next etc all works
but I want to press the MENU button to select a folder on the USB drive

I have done this
begain
prog=irexec
Button=KEY_MENU
config=/home/pi/Mp3.sh
end

and made this script Mp3.sh

#!/bin/bash
mpc stop
mpc clear
mpc load Mp3
mpc play

and put in Home/pi

on the usb  it say USB/B007/MP3        

but when I press it Northing happens  I am totally Lost does anyone have any Idea where I am going wrong

Many thanks