PowerMac G4 will not connect to the internet via ethernet

I am normally a very mac savy person, but I cannot get this to work...
I have an Airport Express connected to speakers, a USB printer and an ethernet hub, which is connected to a cable modem and also a PowerMac G4 via ethernet. There is also a wireless iMac thrown into the mix. All hardware has up-to-date software.
The wireless iMac gets online, prints and plays music wirelessly.
The wired PowerMac G4 will not connect to the internet via ethernet, it is killing me.
I have gone through all the settings and cannot figure this one out. I really appreciate all advice.
Thanks,
G4 Mac OS X (10.4.8)

Hi pradagirl,
Welcome to Apple Discussions!
Leaving the other peripherals out, tell us the connection sequence from the G4 outbound.
Also, you might gain more insight at the Networking Forum
Regards,
John
G5Dual 2Ghz  23" ACD  iSight Mac OS X (10.4.8)  20" Intel iMac 

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