Hi I use apache directory server and I would add a new user ....I use Visual Studio and mx OS is windows vista. the code is this: public static void prova(string FullName) { DirectoryEntry container; DirectoryEntries ChildEntry; container = new DirectoryEntry("LDAP://localhost:389/ou=users,ou=system,dc=example,dc=com", "uid=admin,ou=system", "secret"); try { ChildEntry = container.Children; DirectoryEntry NewEntry = ChildEntry.Add("cn=" + FullName, "user"); NewEntry.CommitChanges(); NewEntry.Close(); } catch (Exception ex) { throw new Exception("Error " + ex.Message); } } The problem is that I have this type of error:The directory service is not available. I tried changing the port with the 10389 but I'm still the same error. The server I think it works, I've tested with apache directory studio. I hope in your help. Sincerely Pepe Gaetano _________________________________________________________________ Nuovo Windows 7: trova il PC pił adatto alle tue esigenze. Scopri di pił. http://windows.microsoft.com/shop