[CentOS] Samba doesn't mapping groups

Hi,


I was trying to setting a user with administrative access using the
net groupmap add command and mapping the Domain Admins group for a
local group with the users I want.
After this using the command net user "username" /domain in a winxp
machine the Domain Admins group doesn't appear in the list of groups
of this user, only the Domain Users group.
What could be? Any help?

--
Cleber P. de Souza