Latitude C/Port II 9105R - Net Card

I Have a Dell Latitude CPx 4898T, and it doesn't have a net card. But I also have a Port Replicator for that laptop PRx 9105R which have a RJ45 port for connection to a LAN with Internet.

Since 2 days ago, I cannot access to the LAN neither the Internet. I was looking for the drivers for the PRx no finding it.

I hope anybody help to get the LAN RJ45 drivers.