Message send don't understand

hi everyone,

i am trying to monitor and control the state of the robot (UR5) via tcp/ip, when i connect with the controller using the ip of the robot and send a message to start the program i get a message of error. after the message of connection was successfully.
cannot upload more than 1 capture, the message of error says " cannot understand: 'p "


the message is “play”

Dashboard server uses UTF8 encoding, try replacing Encoding.Unicode by Encoding.UTF8


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thank you, that was the problem.