DHCP IP for Port-security

Hi, All,

Today, I tested the "port-security" in cisco switch:

I configured a switch port with port-security with static mac-address, after that configuration, I found the workstation can not get DHCP IP from DHCP server.

I configured the port-security normally according to cisco document "port based security". my Cat 2960 -G is running 12.4(r13)T.

Any suggestion ?

Cheers