Joomshopping Backend is not working anymore after upgrading to Joomla 3.1.5

Joomshopping Backend is not working anymore after upgrading to Joomla 3.1.5

this site is getting me crazy.. :-)
I've a blank page when I try to reach che Joomshopping backend in administration.

i've just updated manually joomla to 3.1.5

Can anybody help?

Aw: Joomshopping Backend is not working anymore after upgrading to Joomla 3.1.5

Enable display error
enable debug mode joomla

Aw: Joomshopping Backend is not working anymore after upgrading to Joomla 3.1.5

Still white page... no error shown.

Aw: Joomshopping Backend is not working anymore after upgrading to Joomla 3.1.5

I've set default language (administration) in English.. then reinstall the Italian language pack and everything now is right

I hate Joomla :-))