Networked mac will not share internet connection

When I connect my G4Imac to a Imacdv I can establish file sharing etc but the Imacdv is not able to connect to the internet via the G4Imac. Is this not possible or am I missing something? They are connected by ethernet ports but my broadband is by adsl speedtouch modem.
OSX3.9 on both machines

Hello and Welcome to Apple Discussions. 
Go to  Apple Menu > System Preferences... > Sharing > Internet tab.
Now check the
"Share your connection from: Speedtouch Modem
To computers using:
Built-in Ethernet.".
Then click the "Start" button.
I used to do this but to my Powerbook using Airport. I assume that the Speedtouch connects via USB and has it's own driver installed?
kind regards
mrtotes

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