XMonad Shortcut and Zenity/Qt

Hey guys I want to set a new shortcut for my small costum script (its not optimal, but it works), Qt scripts also dont work. For that i thought to just add a new line in my xmonad.hs file and it should work, but instead nothing happens when I press the keyboard shortcut and im not really sure why..

Here is my script:

#!/bin/sh
tablet=$(xsetwacom --list devices)

tablet=$(echo $tablet | grep -oP "stylus id: [0-9][0-9]")
tablet=$(echo $tablet | grep -oP "[0-9][0-9]")

monitors=$(xrandr --listactivemonitors)
#read screen
screen=$(zenity --entry --text "$monitors")

if [[ ${screen} ]]
    then 
        xsetwacom --set "$tablet" MapToOutput HEAD-$screen;
        echo Tablet set to HEAD-$screen;
fi

and thats what i changed in the xmonad.hs file (the script is called "tablet" btw):

xmonad.hs

I hope you can help ^^

OK I found the answer in the .xsession-errors file.. I have to give the full path. So in my example it was spawn "/home/flo/scripts/tablet"