[Samba] ls not showing AD owner username and groupname

[Gianluca Culot]

I recently upgraded from samba 3.0.14b to 3.0.24.1

everything went well

authentication services accept local and AD users.,

YET

if I list a directory with file owned by Domain Users I see IDs AND DO NOT
SEE names of group and user owner

drwxrwxrwx 3 1500 1513 512 Apr 20 18:14 administrator
drwxrwxrwx 3 2149 1513 512 Apr 4 18:06 user1
drwxrwxrwx 3 2119 1513 512 Apr 4 18:07 user2
with Samab 3.0.14d
drwxrwxrwx 3 root wheel 512 Apr 20 18:14 administrator
drwxrwxrwx 3 user1 Domain Users 512 Apr 4 18:06 user1
drwxrwxrwx 3 user2 Domain Users 512 Apr 4 18:07 user2

Samba is started corerctly and I have NO error in any log
Any Hint ?