epoptes-client_0.5.7-1_all.deb, unable to install it

I'm tryng to install 0.5.7-1 version due to problem with LDAP users.

I'm using Debian 7 which install instead 0.5.6-1 instead so I try to install newer version with dpkg.

The installation of epoptes_0.5.7-1_all.deb works ok without trouble using a well known method to install a deb and fix the dep.:

sudo dpkg -i epoptes_0.5.7-1_all.deb
sudo apt-get -f install

But the installation of epoptes-client_0.5.7-1_all.deb there is nothing to do:

sudo ltsp-chroot -m -a i386 dpkg -i /tmp/epoptes-client_0.5.7-1_all.deb
sudo ltsp-chroot -m -a i386 apt-get -f install

The command "apt-get -f install" instead t fix dep. removes the previous. installed package!

Then I tried to use gdebi:

sudo ltsp-chroot -m gdebi /tmp/epoptes-client_0.5.7-1_all.deb

Now the dependecies are fixed (it install and config required pkgs) but at the end of whole process it says:

...
 epoptes-client dipende da python:any.
..
Si sono verificati degli errori nell'elaborazione:
 epoptes-client

Instead python is installed in chrooted fat client os. Then I launch:

sudo ltsp-chroot -m -a i386 apt-get -f install

but again it removes epoptes-client

Here it is 'dpkg --get-selections | grep python" launched within the chroot:

dpkg --get-selections | grep python

krosspython install
libboost-python1.49.0 install
libpython2.7 install
python install
python-apt install
python-apt-common install
python-aptdaemon install
python-aptdaemon.gtk3widgets install
python-aptdaemon.pkcompat install
python-avogadro install
python-cairo install
python-chardet install
python-cups install
python-cupshelpers install
python-daemon install
python-dbus install
python-dbus-dev install
python-debian install
python-debianbts install
python-defer install
python-fpconst install
python-gconf install
python-gdbm install
python-gi install
python-glade2 install
python-gnome2 install
python-gnupginterface install
python-gobject install
python-gobject-2 install
python-gtk2 install
python-httplib2 install
python-imaging install
python-kde4 install
python-libxml2 install
python-lockfile install
python-minimal install
python-mlt5 install
python-notify install
python-numpy install
python-openssl install
python-packagekit install
python-pam install
python-pexpect install
python-pkg-resources install
python-pmw install
python-pyalsa install
python-pycurl install
python-pygame install
python-pygoocanvas install
python-pylibacl install
python-pyorbit install
python-pysqlite2 install
python-pyxattr install
python-qt4 install
python-renderpm install
python-reportbug install
python-reportlab install
python-reportlab-accel install
python-serial install
python-sip install
python-soappy install
python-software-properties install
python-sqlalchemy install
python-sqlalchemy-ext install
python-support install
python-tk install
python-twisted-bin install
python-twisted-core install
python-uno install
python-vte install
python-xapian install
python-xdg install
python-zope.interface install
python2.7 install
python2.7-minimal install

Any hint about how I can install this deb?

Thanks in advance