xp home unable to connect to internet via hub

thx for your response- the only firewall is the one on
the router. it does not affect anything does it. xp home
is able to get to internet thru the router, but only when
connected thru the hub, i have the problem. any more
suggestions.
-----Original Message-----
Uninstall any firewalls which may be running.
-----Original Message-----
xp home computer is unable to connect to internet or
able
to see or be seen by other computers when it is
connected
thru a hub which in turn is connected to a router to
adsl
modem.
When xp home is connected directly to router,
everything
is fine- all computers can see each other & get on the
internet.
ip address on xp home system defaults to some ip
address
& subnet mask when connected to the hub. Please help
me.
thx. the lights are green both on xp home & on the hub.
but no activitity. when connected thru a router, it
gets
the correct dhcp address & subnet mask assigned by the
router.
Other systems on the network have win 98, 98se, xp pro,
win2k server. it is peer-peer; no dns involved; dhcp
automatically assigns ip address.
.

.