Relay Board Web Based not working

I recently purchased an 8 Relay board from Relay Pros (Ethernet Relay 8-Channel 5-Amp ProXR
ZADR85PROXR_ETHERNET). Web Based configuration was working fine but when I changed the IP address to static and after rebooting the board I get the following error on the Lantronix XPort Device :

"Error retrieving configuration records from the unit.
Web Based configuration seems to be disabled on the unit.

Please enable WebSetup in the Security options via the
serial or telnet based setup and reload the Configuration
Manager to continue with web based setup."

I am able to ping the board and control it but I can’t access the Web Based configuration anymore. How can this be fixed and what is causing this?