I am using ArcGIS Server 10.4.1 and it is serving out a WMS. I am trying to consume this WMS in an old client and it isn't working. When I type the URL in it basically says it can't find it. When I type the URL (https://xxxxxxxx/arcgis/services/AOR/MapServer/WMSServer?&version=1.1.1) it wants to download a file. I have not messed with WMS in the past at all and I'm totally confused. Anyone have any ideas that I can try? Thanks in advance.