IWR1443: A question about programming to change the IP address and port number

Hi Team,

I'm trying to change the IP address and port number of the DCA1000EVM. But I failed.

My step is follow:

First: I try to test the connection with DCA1000EVM and PC

The second, I change the "192.168.33.30" to "192.168.33.31" for system IP address in the cf.json.

   "ethernetConfigUpdate": {
      "systemIPAddress": "192.168.33.31",
      "DCA1000IPAddress": "192.168.33.180",
      "DCA1000MACAddress": "12.34.56.78.90.12",
      "DCA1000ConfigPort": 4096,
      "DCA1000DataPort": 4098
    },

And I send it to the DCA1000EVM.

Third, I disconnect the DCA1000EVM and reset it. And I change my PC IPaddress to "192.168.33.31"

But at this point, I can't connect the DCA1000EVM with my PC.

When I change the PC IP address to the old IP,"192.168.33.30", I also connect the DCA1000EVM with PC.

Please tell me where is wrong.