Error on launching APC Network: Server not available for viewing

Good day, everyone! I hope that someone will be able to help me out with my problem.
Whenever I try to launch the APC Network Access Software, I receive an error of this kind:
Message
Stl-nt-34 is not available for viewing.
Reason: Channel Access Denied.
Ok
I have provided a screenshot below to illustrate my problem.
Does anyone know how to get around this kind of error?
Kindly notify me.
Thank you very much.
