You need to use the SOBI2 extension for JoomSEF in order for the correct URLs to be created: www.artio.net/e-shop/joomsef-extensions/...-joomsef-3-extension
Or you can go to Manage Extensions page in JoomSEF, open SOBI2 parameters and set "Number duplicate URLs" to Yes - the URLs will be numbered, so they should work. Or you can set "Handling" to JoomSEF basic rewriting or Joomla default router on the same page.

Best regards,
ARTIO Support Team

I can't install paid extension to my sites.
The first tip works, it's OK for me. But i tried the second tip too, and it don't works. But it doesn't matter.

Thank you for your help
I love this sites :-)