Can't connect new computer to airport

I have an airport base station at home with my apple laptop that has a wireless card and all runs fine. However, when I brought home a 3 year old apple power macG5 computer I had at work, which was also working off an airport base station at work, the G5 would not connect to the internet off the home airport base station. I've logged into my home airport base station network with the G5, it asked me if I wanted to join the new network, I answered yes and typed in the password. The status window tells me that I'm connected to my home airport and that I'm connected to the internet via ethernet, however, the computer still fails to connect to the internet. I've even gone into the network preferences in the G5 and scanned the airport base station at home and the airport ID now matches the one on my apple laptop setting and still there is no connecting to the internet with the G5. I'm now sure what to do now?

Hello Hgarcia. Welcome to the Apple Discussions!
It may be possible the your G5's AirPort settings either have DNS servers identified or is set up for going through a Proxy.
System Preferences > Show > AirPort > TCP/IP tab
o DNS Servers <look to see if there are entries here, and if not used by your ISP, delete them>
System Preferences > Show > AirPort > Proxies tab
o Remove any proxies that have been enabled.

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Can't connect to internet through Airport Express anymore

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The page Roger posted is good but was very confusing for me. I'll try to help you out since that article was confusing to me.
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Robin Berman wrote:
I still can't connect wirelessly via airport extreme.
Using a Powerbook running 10.6.4
That's not possible. Do you mean "MacBook"?
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http://discussions.apple.com/thread.jspa?messageID=10695921&start=1
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