Hi Barry!
Please, what is your network address?
Be careful that IP Address of K64 must be in range of your network address and subnet.
For example
Network Address: 192.168.1.0
Subnet Mask: 255.255.255.0
the range of your network is 192.168.1.1 - 192.168.1.254 (255 is broadcast)
reserved address for your router is usually 192.168.1.1 so select any address from this range for K64 board.
By default is set 192.168.2.102 in http server demo, make sure that the address in demo code is changed regarding your device.
In case of any question, please let me know.
Best Regards,
Iva