Problem with Airport/Ethernet and Sharing Internet connection

I'm receiving my internet service through a wirless router. I am connected to it through Airport on my Mini. I am also connected to a dt G4 through a wired router (the G4 doesn't have airport). I want to share my connection from airport to the G4 on built in ethernet. On the mini I have internet sharing enabled (from airport to ethernet). I still cannot connect on the G4. Any ideas (should I disable dhcp on the router - tried that and it didn't work)?
10.4.8 on the Mini and 10.3.9 on the G4

Hi Jacob. Interesting setup.
1) If all the computers connect properly to the router, whether wired or wireless, why are you trying the internet sharing?
2) You mention a "dt g4" and an "MDD g4". I'm not a mac guy....are these different computers?
And.
Your mini's on wireless router. OK.
Your "dt g4" is on wired router...Same router?
If it's the same router, your network is something like this:
Internet
|
Router
| | |
#1 #2 3?
is that close?
If so, then you really don't need internet sharing.
Everone's "on", and if sharing is properly setup, all machines should "see" each other.

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    Selamat Phil Smith,
    Actually do we know each other, cause i know a phil smith.
    Actually an ether net cable is OK for the short term. But if i get another computer it may get complex. Spent a lot removing cables too.... Looks like i will have to buy the special modem router... Painful $600.
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