Inkscape extensions not working

Hello,

I have installed inkscape 0.48.4 r9939 and every time I try to use one of its extensions I got this message:

The fantastic lxml wrapper for libxml2 is required by inkex.py and therefore this extension. Please download and install it through your package manager by a command like: sudo zypper install python-lxml

and the extension doesn’t work.

I already installed and reinstalled the python-lxml as well as the libxml2 but it didn’t solve anything. Any idea? Thanks.

Linux 3.7.10-1.1-desktop
openSUSE 12.3
KDE 4.10.00
Inkscape 0.48.4 r9939
Python-lxml 2.34-6.1.1

Is inkex.py in

/usr/share/inkscape/extensions/

?

Yes, it is.