Does not work after replug; HP Lj 1018

Hello.
I have downloaded the latest HPLIP from the sourceforge, 2.7.12

First, I tried to install the self-extracting .run file. It managed to install, but after I have replugged my printer (LJ 1018), it stopped working.

Then I tried to install it manually, following the instructions posted on the site, step by step.
After all, the printer printed the test page. But after turning it down and then again up, it refused to work :)

Here is what

hp-check -t

says:

***********************************************

mihail@mihail-desktop:~$ hp-check -t

HP Linux Imaging and Printing System (ver. 2.7.12)
Dependency/Version Check Utility ver. 12.2

Copyright (c) 2001-7 Hewlett-Packard Development Company, LP
This software comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to distribute it
under certain conditions. See COPYING file for more details.

Saving output in log file: hp-check.log

Initializing. Please wait...

---------------
| SYSTEM INFO |
---------------

Basic system information:
Linux mihail-desktop 2.6.22-14-generic #1 SMP Tue Dec 18 08:02:57 UTC 2007 i686 GNU/Linux

Distribution:
ubuntu 7.10

HPOJ running?
No, HPOJ is not running (OK).

Checking Python version...
OK, version 2.5.1 installed

Checking PyQt version...
OK, version 3.17 installed.

Checking SIP version...
OK, Version 4.7 installed

Checking for CUPS...
Status: планировщик запущен
Version: 1.3.2

Checking for Reportlab...
OK, version >= 2.0

----------------
| DEPENDENCIES |
----------------

Checking for dependency: cups - Common Unix Printing System...
OK, found.

Checking for dependency: cups-devel- Common Unix Printing System development files...
OK, found.

Checking for dependency: gcc - GNU Project C and C++ Compiler...
OK, found.

Checking for dependency: GhostScript - PostScript and PDF language interpreter and previewer...
OK, found.

Checking for dependency: libcrypto - OpenSSL cryptographic library...
OK, found.

Checking for dependency: libjpeg - JPEG library...
OK, found.

Checking for dependency: libnetsnmp-devel - SNMP networking library development files...
OK, found.

Checking for dependency: libpthread - POSIX threads library...
OK, found.

Checking for dependency: libtool - Library building support services...
OK, found.

Checking for dependency: libusb - USB library...
OK, found.

Checking for dependency: make - GNU make utility to maintain groups of programs...
OK, found.

Checking for dependency: PIL - Python Imaging Library (required for commandline scanning with hp-scan)...
OK, found.

Checking for dependency: ppdev - Parallel port support kernel module....
OK, found.

Checking for dependency: PyQt - Qt interface for Python...
OK, found.

Checking for dependency: python-devel - Python development files...
OK, found.

Checking for dependency: Python 2.3 or greater - Required for fax functionality...
OK, found.

Checking for dependency: Python 2.2 or greater - Python programming language...
OK, found.

Checking for dependency: Reportlab - PDF library for Python...
OK, found.

Checking for dependency: SANE - Scanning library...
OK, found.

Checking for dependency: SANE - Scanning library development files...
OK, found.

Checking for dependency: scanimage - Shell scanning program...
warning: NOT FOUND! This is an OPTIONAL dependency. Some HPLIP functionality may not function properly.
To install this dependency, execute this command:
sudo apt-get install --yes --force-yes libsane

Checking for dependency: xsane - Graphical scanner frontend for SANE...
OK, found.

----------------------
| HPLIP INSTALLATION |
----------------------

Currently installed HPLIP version...
HPLIP 2.7.12 currently installed in '/usr/share/hplip'.

Current contents of '/etc/hp/hplip.conf' file:
# hplip.conf. Generated from hplip.conf.in by configure.

[hpssd]
# Note: hpssd does not support dynamic ports
# Port 2207 is the IANA assigned port for hpssd
port=2207

[hplip]
version=2.7.12

[dirs]
home=/usr/share/hplip
run=/var/run
ppd=/usr/share/ppd/HP
ppdbase=/usr/share/ppd
doc=/usr/share/doc/hplip-2.7.12
icon=/usr/share/applications
cupsbackend=/usr/lib/cups/backend
foomatic=/usr/share/foomatic

# Following values are determined at configure time and cannot be changed.
[configure]
network-build=yes
pp-build=yes
gui-build=yes
scanner-build=yes
fax-build=yes
cups11-build=no
doc-build=yes
shadow-build=no
foomatic-xml-install=yes
foomatic-ppd-install=no
internal-tag=2.7.12.10

-------------------------------
| DISCOVERED PARALLEL DEVICES |
-------------------------------

No devices found.

--------------------------
| DISCOVERED USB DEVICES |
--------------------------

  Device URI Model
  -------------------------------- ----------------
  hp:/usb/HP_LaserJet_1018?serial= HP LaserJet 1018
  KP1C2FL

---------------------------------
| INSTALLED CUPS PRINTER QUEUES |
---------------------------------

warning: No queues found.

----------------------
| SANE CONFIGURATION |
----------------------

'hpaio' in '/etc/sane.d/dll.conf'...
OK, found. SANE backend 'hpaio' is properly set up.

Checking output of 'scanimage -L'...
error: scanimage not found.

---------------------
| PYTHON EXTENSIONS |
---------------------

Checking 'cupsext' CUPS extension...
OK, found.

Checking 'pcardext' Photocard extension...
OK, found.

Checking 'hpmudext' I/O extension...
OK, found.

Checking 'scanext' SANE scanning extension...
OK, found.

-----------------
| USB I/O SETUP |
-----------------

Checking for permissions of USB attached printers...

HP Device 0x4117 at 002:008:
    Device URI: hp:/usb/HP_LaserJet_1018?serial=KP1C2FL
    Device node: /dev/bus/usb/002/008
    Mode: 0666

-----------
| SUMMARY |
-----------

error: 1 error or warning.

Summary of needed commands to run to satisfy missing dependencies:
sudo apt-get install --yes --force-yes libsane

Please refer to the installation instructions at:
http://hplip.sourceforge.net/install/index.html

****************************************************

Please help me out :) thanks for support