Trying to connect the NHR 4600 Programmable AC Load at MATLAB/SIMULINK environment.

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Hi everyone, I am trying to connect the NHR 4600 Programmable AC Load at MATLAB/SIMULINK environment. As I understand this hardware has own IVI drivers. I create .mdd files to work with it. In my research I need to connect this device to MATLAB/SIMULINK environment. So, the problem is: - I found out how to make .mdd files to work with IVI-drivers . Now, when I try to connect the device from the MATLAB (MATLAB -> App -> Instrument control -> Test &Measurement Tool -> Instrument Control Toolbox -> Device object -> connect or simply type in MATLAB command line tmtool), NHR start to be activated loads 1, 2 and 3, and suddenly and very quick showing: releasing device - please wait. Could you say, what I am doing wrong? and what is the next step to connect this load to SIMULINK? and one more question, may seems very stupid: How I can represent this load at SIMULINK?
Yes, I install the VISA; working at 32 bit MATLAB. It has serial connection RS232 between device and PC.
P.S.: I have got answer from the NHR, such as:

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