[Plugin: Hikari Category Permalink] only the last category in permalink

I have WP 3.0.3 and I have installed this plugin.

In panel of permalink I have “/%category%/%postname%”

My structure is this:

Category “libri” contains categories “per-eta” and “argomento”
The category “per-eta” contains categories “0-3”, “4-6” and “7-9”
My post is in category “0-3” that is in category “per-eta” that is in category “libri”

Can I specify, with this plugin, ONLY the category “0-3” in permalink?

I have do some test but don’t work.
In the list of categories I select for permalink only my category “0-3” but the result of permalink is “localhost/mysite/libri/per-eta/0-3/post-name”

I would like “localhost/mysite/0-3/post-name”, it’s possible?

I wrong something?

Thanks