impossible to access linked directory through samba

my usr/local directory is located in a different disk.
it is declared like that
cd /usr
ln -sP …/fs/hd0-qnx4/usr/local local

my smb.conf is

[local_include]
path = /usr/local/include
public = yes
writable = no


NT says that the name \serveur_qnx\local_include, displayed in the
pathnames list, doesn’t exists.

Any idea?

Alain.