I dunno the product, but I might be this ...
http://www.cisco.com/en/US/docs/wireless/access_point/csbap/wap4410n/administration/guide/WAP4410N_Admin_Guide.pdf
page 25 ...
STEP 1 Click Setup > Basic Setup .
STEP 2 From the IP Settings drop-down menu, select one of the following options:
• Static IP Address—Select this option to assign a static or fixed IP address
to the access point.
• Automatic Configuration—Select this option to automatically configure
the IPv4 network settings of the access point using a DHCP server on your
network. Also select this option to automatically configure the IPv6 network
settings of the access point using an IPv6 RADVD device enabled on your
network.
But i think it is just a brigde, hence your DHCP server is external to the device.
So you have nothing to disable so to speak:
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From the Frequently Asked Questions, in the above PDF:
Q. Can the access point act as my DHCP Server?
No. The access point is nothing more than a wireless hub, and as such
cannot be configured to handle DHCP capabilities.