Mounting local directories on Maemo device does not work

I opened <QtSDK>\Examples\4.7\itemviews\addressbook\addressbook.pro in Creator and set up a Maemo device target. In the run settings I defined the following directories for mounting:

When I run the application, /mnt/dls is being created as an empty directory but I cannot access the contents of my local directory. When I quit the application, the empty directory remains.
/tmp/dt is not even being created.