Internet Access problem in Fedora Core 4

Hi

I m new to the linux/unix world. I m facing a problem while i try to
access internet on Fedora Core 4, kernel build 2.6.11.

I m using an ethernet LAN card to access the internet. I m behind a
proxy. I m using 3com Etherlink XL 10/100 card. As i enter a url ( any
url) in firefox web browser in kde, i get an error message to the
effect of " cannot find the address, please check the address." I saw
the same problem being reffered to on another forum, somebody suggested
that the system in this case is not able to see the internet. I did not
understand what they suggested there, perhaps that suffices to say that
i m new to this unix/linux world.

I did manage to activate my LAN card. How ever the browser doest open
any page to view. The same LAN card works fine on XP as i have a dual
boot system. Is it something to do with the connection settings,
loopback interface, browser settings, the proxy that my isp is using to
allow security or is it something more complicated.

Please suggest a solution, im struggling to resolve the issue. Its not
a good feeling at all.

Regards
j,aldin

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