I guess that you want associate your wlan0 with AP? Then you should use also "iwconfig wlan0" command.
And as for me, i recommend use "ifup" and "ifdown" scripts for reconfiguration network...

Or try "poweroff"

I think what this address reserved.
Check this: http://wiki.wireshark.org/Gratuitous_ARP

Have you tried this:
Press "Panel tool box" button at right edge of taskbar -> select "More Settings" -> and press "Maximize panel" ?

And in addition...
You should install additional language packs for KDE. For your language, command will be as below:


apt-get install aspell-<lang> kde-i10n-<lang> language-pack-kde-<lang>...

Try this:

dpkg-reconfigure console-setup