Please see the attached screenshot. I have changed the default LAN IP address (to 192.168.1.1) and also the DHCP server address range accordingly. 192.168.1.100 and 192.168.1.101 are the DHCP clients on the LAN of SA500. The client is able to ping SA500 as well as the other client.
Please make sure that the old IP address is released from the clients. Once client has released the old IP address, the client should send a new DHCP request and will get an IP address from the new DHCP pool.