samba - Aug 2005 - win2003 with native active directory and linux samba

i have successfully logged my linux box into win2003 active directory
using samba. i can access the active directory shares from kde and
gnome's file managers. but i encountered a peculiar problem when i tried
to mount that share using mount -t smbfs. the directory where i mounted
the share became totally unaccessible. even root could not access it.
but the mount command was successful. i could even successively
unmounted it successfully. but could not access the mounted directory.
can you give me any clue about it.
-- 
jaybrata