Can't connect to sever 16

[a7madmotaw3]

Hi all,

I have a problem connecting to my server, The FMS 16 is installed on windows server 12 on one machine and all required ports are opened, when trying to conncet from other devices with FM pro 16 installed on windows 10, whether it sees the server name by itself or I enter the IP. it keeps saying "waiting for response" as in the below image then "connection failed".. I failed to locate the problem..NB windows fireall is turned off on both the server and end user device

 

Any help?!