Hi, I have some problem with profile url and social sharing (using addthis.com or socialshare.com)

When I try to share (via fb or tw or other) profile page I get 404error page (you can see at this page):
http://www.italiapre[...].it/Aurifex_Srl

But If I deactivate (or don't set) profile url like in this page:
http://www.italiapre[...]/Barbara%20Shop
everything work good..

If i set, in global configuration of joomla, url sef to OFF and revrite url to OFF, all work ok, but i need to set ON these two important function..

Can you help me ?
Thank you,
Zak