That does not seem to fix it. I was referring to the Conquest GUI, Browse database tab, right click on the image, Use K-PACS viewer option. Not the web server.
Is the K-PACS viewer in the Browse Database tab hard coded to port 5678? I get an error Conquestdicomserver, Server not running(in this directory), when the server is set to port 104. I have not tried any other ports. When I set the port back to 5678 then the viewer works without error.