Internet on Ubuntu 7.04 turion 64-bit

[David VandeBunte]

I am new to ubuntu/linux and am having trouble connecting to the internet
even by a wired ethernet cable.  The cable is connected right into the back
of my family's microsoft wireless router, but internet won't come up on my
Dell Inspiron 1501 laptop (the processor is an AMD Turion 64 X2, and the
computer is dual-booted to vista and ubuntu).

The most frustrating part of the deal is that it seems to recognize I am
connected to something but I can't get the internet.  Ubuntu takes a long
time "Requesting a network address from the wired network" and finally gets
connected, saying "Conncetion Established - you are now connected to the
wired network."  Yet when I click on Firefox it just sits for a long time
until saying it can't find the server at google.

Can anyone help?  If you need more information I will try to jump on it
right away, I want to try ubuntu but I have been on this problem a long time
and am getting discouraged.
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