samba - Dec 2002 - Samba 3,0 alpha21 - fail to join the domain !

Hi all,

After installing the Samba 3.0 alpha21 release, I can login to the domain
by kinit administrator@XXX.COM, then I want to join the domain
by
>net ads join
it prompt the "root" and asked me for the passwords. However, after
entering the password, the following error message display :

utils/net_ads.c:ads_startup(148)
ads_connect : No such file or directory

Do you know what's going wrong ? (remarks : I can join the domain
succesfully by the release samba3.0 alpha20)

Thanks a lot
Mandy