Ethernet card problems ;(

Hello,
I just rented USI's broadband modem and my Ethernet card isn't even talking to it. I need help! On on Windows XP.
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More about ethernet card problems
  1. ...more info:
    I'm not sure, but I think the problem is at the OS level. When I connect the Cat 5 cable, both the modem's and the Linksys Ether net card's status lights turn on, just like as if connecting to a router. I know the Ether card works, because six months ago (when I was living some place else) I connect to the Internet via this Ethernet card to a router.
    The strange thing is that when I go into the Properties of this NIC card, and click on Internet Protocol (TCP/IP), ...Oh God, I just fixed it!
    For some reason, the Internet Protocal (TCP/IP) check box was unchecked...go figure. I checked it and everything started working immediately! FknA! (excuse my French.) Why it was unchecked in the first place, I don't know. Anyway, I'm getting some impressive bandwidth now.
    And all because I asked for help.
  2. Another question: What happens if I enable both the WiFi and modem at the same time? I know that USI's nodes have two separate parts: one for WiFi and another to support their modem. If I enable both, what happens? Do I get double the bandwidth? Does an Internet application have a choice of which Internet connection to use? How does that work?
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