This may be one reason for the problems:

http://www.gphoto.org/proj/libgphoto2/support.php

http://gphoto.sourceforge.net/

If you want to try it, gphoto is in Synaptic, plus other camera tools. KDE has
one, too.

The last time I used camera tools was on Mint Linux and I added digital camera
tools, t think.

I think he was referring to LUSB, but type it in lower case. But to use it
you'll need to install a dev library file, and I couldn't run it either from my
Ubuntu 10.10 computer.