Cannot share airport connection to ethernet

Hello everybody,
I am getting a wifi signal on my BlackBook [OSX10.5.8], I am browsing and sending emails. My partners little 12" PowerBook [OSX10.4.11] can't connect to the signal due to distance and inferior antenna.
1] So I am sharing the incoming wifi signal on my BlackBook over the Ethernet and I don't use the firewall.
2] I connect both computers via a patch cable.
3] Now when I set the PowerBook to automatic location it should work. At least that has been the case at previous ocasions, but now it only shows 3 green dots instead of 5?
4] So I thought going about it the manual way. Looking up the IP address on the BlackBook of the outgoing Ehternet port.
in Terminal [type: dig] I am finding the Router address:
5] On the PowerBook in the Network pane at the Build-in Ethernet tab I set it to manual and fill in the numbers. I understood that for the IP address I had to add one number, I did. I am guessing the DNS Servers to be the same as the Router address:
6] All but the Network Settings are green.
Still not being able to connect the PowerBook to the internet. What am I missing, and why is it so difficult?
Adventurous greetings,
Coen

Hello Bob,
Thank you for taking time to look into this, I really appreciate it.
So let me start afresh:
- MacBook [10.5.8] recieving wifi from 192.168.2.8 and has got everything working. Firewall turned off.
- Sharing is turned on on the MacBook
- And is giving out the folowing IP:
- I checked in the Activity Monitor and 'bootpd' and 'named' are both running:
Now I go over to the PowerBook [10.4.11] which I can interact with, I see the Desktop on my MacBook.
- I have locations on automatic and I see that it is getting a 192.168.2.45 address:
- this is the Network window showing Ethernets TCP/IP settings:
But still no connection?
Now before I go futrther, I would like to have some feedback. Am I doing something wrong here? This is as I have done it numerous times before and it worked. The only thing I can think of is that in Brazil we were getting wifi from some giant media station and the guys entered some proxies in the Network pane, in my automatic location. But I have cleared all that. Is there a way to make sure everything is clean, like a reset sort of thing? Or is that overkill?
What is my next step into getting closer to a solution?
Adventurous greetings,
Coen

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Cannot share airport connection to ethernet

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