ok, you will have to follow the instructions it is giving you. As root you need to make a directory called /mnt/app and make it writable by you (you could just "chmod 777 /mnt/app"), then you need to edit /etc/fstab and add the lines you have listed below. It's a bit strange that you are getting the errors though I'm in #klik on irc.freenode.net at the moment if you want to try and figure it out, not sure how much longer I'll be there for though