Integration OPManager with DeviceExpert on different server

Integration OPManager with DeviceExpert on different server

I try to integrate OpManager with DeviceExpert on different server.
I set server name, port (6060), protocol settings (https), import SSL certificate from DeviceExpert (de.cer) on local folder of opmanager and set authentication detail, but when i test connection this is the error :
"Unable to fetch values from DeviceExpert, The server might not be running or the network traffic may be too high."

How can i fix it ?

thk
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