In MSFS 2020, I'm having a problem getting the autopilot to keep the plane on the glideslope. I set as the destination Logan Airport, Boston, runway 4R using the "world" page. After hitting "fly now", I setup the FMS to select runway 4R ILS.
When I fly the plane manually, I do see the diamond shaped markers that indicate the plane's horizontal and vertical position relative to where it should be on the glideslope. It's just that I can't get the autopilot to do any control of keeping the plane on the glideslope.
I did activate the autopilot by hitting the "ap" button and I did hit the "appr" button.
And further, if I manually control the plane's altitude to keep it on the glideslope, this turns off the autopilot and now it does not even control the horizontal position of the plane anymore.
I wonder if I missed doing something that was required?