HLK Studio does not show my driver in selection tab

I am trying to do HLK testing for my own driver by this instruction http://ift.tt/2szN3kf , but I have problems.

I can not do step 5 as I do not see my driver in the list of .sys files I can select for testing in HLK Studio selection tab. My driver is stored on test machine in location C:\MyDriver\mydriver64.sys. It is 64-bit kernel mode driver used by my application for RAM analysis.

What can I do to add my driver to the selection list and run HLK tests for it?

Thank you.