How could I assing an IP a client.

Hello, I want to know if it is possible assign IP to clients with the freeradius. I have tried to do this with a Sql user and setting Framed-IP-Address = 172.16.3.33 Framed-IP-Netmask = 255.255.255.0 values in radreply but i doesnt work. The client always take the IP from a DHCP server. I using freeradius 2.1.6 and validating wifi users with PEAP. The user validation works correctly. Thanks in advance.