Cannot get IP address from Router DHCP

Hi,
I set a Home Network a few months ago consisting of a wired desktop
connected through a D-Link NIC, a wireless Dell laptop using its
TrueMobile G card and another wireless desktop connected through a USB
G linksys adapter and using a Linksys WRT54G Router. Everything worked
fine until two days ago when the wired desktop suddenly stopped
connecting to the network and to the internet. I did not install
anything new nor made any changes to the network configuration. The LED
on the router and the NIC were green suggesting connection but the
desktop got an autoconfigured IP address instead of the assigned by the
DHCP on the router and I could not ping the router or any of the
computers on the network (they were on a differente subnet mask).
Since this strange phenomenon happened I had tried:

* Assigned an static IP address to the wired desktop; now it can
access the network and ping other computers on it but I can't ping
yahoo.com or access the internet from this computer. The wireless have
no problem at all accesing both services. Now, a strange thing is that
I can ping the router but I cannot get to its web based utility by
typing its address either on Firefox o IE6. I can do this from the
wireless laptop without a problem.
* Disabled the wireless card on the Laptop and wired it directly to
the router. It can connect to the router, the network and internet.
* Bought a new NIC, now a Linksys Network Everywhere (hoping for
compatibility with the router) and cable and installed it on the wired
computer. Same problem: autoconfigured address and no access.
* Did a hard reset on the Motorola Cable Modem and on the router
and reconfigured manually the options. No luck either.
* Disabled and then unistalled ZoneAlarm to test connections. Still
no internet access. I have now reinstalled it and accessing the network
through a static IP but I cannot connect to the internet.

So far it does not seem to be related to the router, the cable or the
NIC card on the wired desktop so I am thinking of a software setting. I
have run out of ideas of things to try and hope you can help. The wired
desktop is running W2K Professional and the others XP SP2. The wireless
network is running with WEP but I have no problem in the wireless
section of my network, it's the wired the problem.

Thanks for your interest in helping me,
Efren

.

Relevant Pages

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