Ignition - Echo response in secs/gem

I was working on echo response in secs/gem. I created a response for s2f39 message. I wrote a script to send the request to the simulator. The response is shown as none. I have edited the sdl messages on both sides so that the request body contains only dataid. This is the message I have sent.

myEquipment = “equipment1”

body = [{“format”:“U”, “value”:100}]

transactionID = system.secsgem.sendRequest(“S2F39”, True, body, myEquipment)

print transactionID
response = system.secsgem.getResponse(transactionID, myEquipment, 2)
print response

I have send the message by including datalength also. result is the same.
This is the echo response I have created:

name:resp1
stream:2
function:39

response{2}

header{4}
stream:2
function:40
reply:true
doc"Report grant"

body[1]
0 {3}
format:B
value:0
doc:GRANT, multiblock request grant

How can i obtain the response?

Thank you.