[Samba] User unable to change their password using smbpasswd

[FCG Lu Bei]

May anyone help me solve the problem? I use samba 2.2.2 on Solaris 8

ngnvob02 [** NONE **]/export/home/sitlb $ cd /usr/local/samba/bin
ngnvob02 [** NONE **]/usr/local/samba/bin $ ./smbpasswd
Old SMB password:
New SMB password:
Retype new SMB password:
machine 127.0.0.1 rejected the tconX on the IPC$ share. Error was : =
ERRSRV - ERRbadpw.
Failed to change password for sitlb

But I can change the passwd as root.=20

Thank you very much!