HP laserjet 1536 dnf/ MFP does not scan

Hi,
I made this HP 1536 MFP to work finally.
It's a network printer, scanner and copy machine.
If Xsane doesn't find any devices there are some things to do:
1. install libsane-extras
2. create symbolic link: ln -s /usr/lib/libhpmud.so.0 /usr/lib/libhpmud.so
3. install the new hplip (it worked for me)
You need the latest hplip package from the HP official site: hplip-3.11.3a.run [this is the latest as per Apr 2011]
Check your current package:
debnslee04#sudo dpkg -l hplip
||/ Name Version Description
+++-==============-==============-==================
ii hplip 3.9.2-3ubuntu4 HP Linux Printing and Imaging System (HPLIP)

Download the latest package from the official HP website:

http://hplipopensource.com/hplip-web/install/install/index.html

After downloading the file you have to chmod 777 on the file and run it;
The installer will guide you, choose custom, with no fax and no html help files;
It will prompt for 4 or 5 required dependency, you have to install the missing dependency either with apt-get install <package> or you open synaptic package manager and install this packages - because the names of the package does not match with the error message printed on the screen.
In my case I installed:
libgtk2.0-dev
libtool
libcupsimage2-dev
libsane-dev
libsnmp-dev
python-qt4-dbus

After intstallation I restarted some services[you can reboot your computer] and a HP tray will appear on the panel after reboot, you have to open it and choose to install a missing plugin.
After this plugin installation done automatically, the scanner worked smooth, I use Xsane Image scanning program.

Good luck,
Seb