First time using ASIImg with ASI585MC Pro and Celestron Nexststar Evo 9.25. Connecting to the ASIImg software, it recognizes the camera, but no image appears - the screen is white and the histogram shows no graph and no changes when the exposure or gain is changed. My imaging train is a Celestron field reducer, ZWO filter drawer/filter and the camera with adaptors for proper back focus. The same imaging train produces an image on the ASICap. Please advise.