more information:
the win XP and Server 2003 are in different network! When I put both machines to the same network, there is no problem! Between networks is firewall, but it support all protocols..
-pete-
Whoa...I have a glimmer of what your problem is, I think, but I'm not
100% sure without knowing this: are you trying to set up this machine
to logon to both domains? Is that what you mean by "between networks"
oand "different networks?"
Of course you can't take the XP machine on Domain A and join it to
Domain B. It can only exist on one Domain at a time. You CAN enable
it to logon to either Domain, but you need to do that from the
Servers, by establishing Trust Relationships between the domains.
Oh, by firewall are you actually referring to a router? That's
another important piece of this puzzle.
You may be better off taking this problem to a networking group, as
it's not really related to XP in general. This is fleshing out to be
more of a networking issue.