[Samba] pb with unicode character

[christian.borne at ratp.fr]

Hello,
I have problems with samba when I want 'mount' a filesystem NT.
I have this message after the mount :
"caractère unicode non valide"

And it was impossible to have access datas into the directory .....
To have access, it's necessary to change the name of the directory and
remove the bad character 

Is the solution to use option 'codepage' or 'iocharset'
But I try without results !!!!

Thanks