[Samba] samba 3.0.2a and passwords

[Emerson Lombardi Machado]

Hello
version samba-3.0.2a, OS redhat 9

I configure the samba-server to use pdbedit.... but my stations winXP
can't change the passwords, always we receive message error (You not
have permission to change password) but all users can change and
permission is ok...
I read in internet that version of the samba maybe have a problem with
passwords on windows Xp, is this true?
Anybody can help-me?
-- 
Emerson Lombardi Machado