How to DHCP port forward on Dlink Router

Greetings,
I have 3 computers on a LAN. Powerbook G4 (Mac OSX Server 10.4.11), Macbook Lepoard (OSX 10.5.2), and Windows XP. I have Dlink Wireless Router (DIR-625). My Powerbook is connected to router via ethernet cable. the others connect wireless.
i want to use Powebook G4 running server to act has DHCP Server, and NAT. Currently, I setup Dlink to act as a Wireless Access Point by turning of router's DHCP server. I assigned Powerbook a static IP address then turned on DHCP server with DHCP ranges. (no overlapping). Then I assigned Dlink a ip address outside of the range. I turned off everything. Then turned on devices in this order.
1. Router
2. PowerBook
3. Other computers
When I check my Macbook connection. It self-assigns IP and does receive DHCP from Server. I checked all settings. But no luck. Is there another way to do this? should i be port forwarding instead?
Confused
Thank you

Made a typo:
I meant to say...
When I check my Macbook connection. It self-assigns IP and does NOT receive DHCP from Server. I checked all settings. But no luck. Is there another way to do this? should i be port forwarding instead?

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