3390 as scanner is not recognised

first what works ;)
- 3390 as printer is running perfect via network
- client system has opensuse 11.1, actual hplib, libsane0, sane-backends sane-backends-autoconfig sane-frontends xsane

Now, what's wrong
- scanner is not detected by scanimage -L (same with root)
- same of course with other apps xsane
- YaST will recognise the scanner, but is unable to attach some "missing link"

i looked up the internet and here the results of parameters, that were checked

/etc/udev/rules.d/55-libsane.rules
# Hewlett-Packard LaserJet 3390 | Hewlett-Packard LaserJet 3392
ATTR{idVendor}=="03f0", ATTR{idProduct}=="3517", MODE="0664", GROUP="lp", ENV{libsane_matched}="yes"

/etc/services
# 6559-6565 Unassigned
sane-port 6566/tcp # SANE Control Port
sane-port 6566/udp # SANE Control Port

/etc/xinitd.d/sane-port
service sane-port
{
 socket_type = stream
 port = 6566
 wait = no
 user = root
 group = root
 server = /usr/sbin/saned
 disable = no
}

-> some extra question: if i want all users beeing able of scanning, should i replace group root by group users?

/etc/xinetd.conf
has the line:includedir /etc/xinetd.d

/etc/sane.d/saned.conf
has the ip of the scanner

-> some extra question: shouldn't it have been the ip of the opensuse client?

cmd: telnet server 6566
Trying 62.157.140.133...
telnet: connect to address 62.157.140.133: Connection refused
Trying 80.156.86.78...
telnet: connect to address 80.156.86.78: Connection refused

-> some extra question; these ips are not expected, we have local ips like 192.168.*. What's wrong here?

/etc/saned.d/net.conf
no ip was inserted, gave the linux pc id a try, but didn't work

cmd: scanimage -L

No scanners were identified. If you were expecting something different,
check that the scanner is plugged in, turned on and detected by the
sane-find-scanner tool (if appropriate). Please read the documentation
which came with this software (README, FAQ, manpages).

So far my investigations. Any idea, what is to be done?