[Samba] secure channel

[Alexandr Harlampov]

Help please.
How to reset the secure channel between the domain controller on samba3 
and workstation with Win XP?
this workstation worked properly till today, but now it can't log in to 
domain .
I have run a netdiag utility and has seen the issue:
rust relationship test. . . . . . : Failed
    [FATAL] Secure channel to domain 'MYDOMAIN' is broken. 
[ERROR_ACCESS_DENIED]

may be another way to fix it (except rejoining a domain) ??

thanx in advance