Follow the instructions under "Adding this PPA to your system". Then do a full system update by running the commands
sudo apt-get update
sudo apt-get dist-upgrade
in a terminal window. This should update all HPLIP packages on your system to 3.11.1 (and perhaps will do some security updates if your system was not up-to-date before).
TechTK, I have backported the newest HPLIP (3.11.1 from Natty) to Lucid now. You find it in my PPA:
https:/ /launchpad. net/~till- kamppeter/ +archive/ ppa
Follow the instructions under "Adding this PPA to your system". Then do a full system update by running the commands
sudo apt-get update
sudo apt-get dist-upgrade
in a terminal window. This should update all HPLIP packages on your system to 3.11.1 (and perhaps will do some security updates if your system was not up-to-date before).
Try to scan again. Now it should work.