Please I need help making my AP to work with Windows DHCP allow policy

If I disable DHCP Allow Policy, the AP works fine. But once I enable the policy, even with the MAC of the AP allowed under the policy, the AP becomes unable to connect clients with IP. I cannot afford for the DHCP server to respond to every DHCP request. The allow policy is to ensure only allowed systems are assigned DHCP configuration.

I will appreciate help please.