To enable the web service you will need to download the "Web Enabler", you can find this and any of our software in our downloads page. I have given you a shortcut below for your convenience. 

DX Access Control Downloads: Software

Windows | Web Service Enabler

After you have done this run the software and ensure that your Computer and DX board are on the same network. 

After finding the board with the tool click on the SN# to highlight the board and select "Advanced Option" this will allow you to edit the IP address of the board if you wish to do so.

Then Click on "Try Web"
The WEB field will not show "Enabled" 

After this it will open your browser and give you a login page (username : abc Password: 123) 

Here are the settings that you can change.