SIMPLELINK-CC2640R2-SDK: TOF RTLS Agent issue

Hi TI expert,

I am trying to build the TOF test environment according to the RTLS Agent Readme on TI Resource Explorer.

I have programed 3 boards with RTLS Master, RTLS Slave and RTLS Passive projects. And connect them all to one PC(windows10 64bits).

Then I run the websocket_server.exe under \simplelink_cc2640r2_sdk_2_40_00_32\tools\blestack\rtls_agent, Both the RTLS Master and the RTLS Passive are connected.

After that I use Firefox and go to http://dev.ti.com/gallery/ , open the RTLS Monitor application. but the CONNECT button is not available.

So did I miss some steps or something?