However obviously ToolKit cannot access the COM port or no connection to the device.
Check the Baudrate which is setup in the DTSC-200's Serial Interface #1
-through the HMI push buttons, enter Code first. e.g. 0003 or 0500, then check the baudrate if it is lower than 9600.
(ToolKit only works with baudrate >=9600 kbps)
-maybe that is the issue?
ToolKit started as Administrator?
Verify with your IT department if you actually can use the USB port / COM port in anyway