AIX and passwd chat

[Mathias Wohlfarth]

I have problems to get the password chat running. I tried with also with a
script, that does nothing more than writing something to a file. But
nothing happens. It seems that the program fails to start.
Can anyone help?
This is the output from log.smbd:
[2001/11/21 17:35:36, 3] smbd/chgpasswd.c:chat_with_program(425)
  Dochild for user s01user (uid=0,gid=0)
[2001/11/21 17:35:38, 100] smbd/chgpasswd.c:expect(266)
  expect: expected [*fertig*] received [] match no
[2001/11/21 17:35:40, 100] smbd/chgpasswd.c:expect(266)
  expect: expected [*fertig*] received [] match no
[2001/11/21 17:35:40, 10] smbd/chgpasswd.c:expect(277)
  expect: returning False
[2001/11/21 17:35:40, 3] smbd/chgpasswd.c:talktochild(303)
  Response 1 incorrect
[2001/11/21 17:35:40, 3] smbd/chgpasswd.c:chat_with_program(358)
  Child failed to change password: s01user
[2001/11/21 17:35:40, 3] smbd/chgpasswd.c:chat_with_program(396)
  The process exited while we were waiting