In message <35293662.20E198D4@nmsu.edu>, Fujie Zhang writes:
>i can't su. it says: "su: you are not listed in the correct secondary group (wheel)
>to su root". but my owner group is "wheel". Also, i get almost the same message when
>i tried to change owner group of any file using chown.
>BTW, i could not login as root at all using xdm, but login as a non-root user was
>fine. help pls. thx.

list your username in /etc/group under wheel, for ex:

wheel:*:0:root,joeuser

--Dan