1) drop and recreate SP => dont' work
2) clear all cache for this SP => don't work
3) restart SQL => don't work
4) created a new SP with a different name but the same code => it's work
a strange thing :
the SQL login is in french, with this login in SSMS, it's ok
the connexion string in application have "current language=french"=> not ok
set the connexion string in application to "current language=english"=> ok (but I can't change the connexion string definitely)
change SQL login to english and connexion string "current language=french" => not ok
I don't understand