beaglebone lxde ubuntu

Hello i have installed this image on my BBB :
but I didn’t have /sys/devices/bone_capemgr*
so i did this:

sudo apt-get update
sudo apt-get install linux-image-3.8.13-bone68
sudo reboot

but then I don’t have lxde anymore even thought it is still installed.
I tried to remove and purge and then reinstall it but still dont work.
How to do?

thank you