It's what you put into the progid.
Code:
<?component error="false" debug="false" ?>
<registration progid="Xyzzy.Weather" classid="{0C65384D-4054-4745-B224-BCF9A39A4F8A}" description="ACP weather server for Xyzzy" remotable="no" version="1.0">
</registration>
Be sure to use a GUID generator to make a unique classid.
Maybe you registered it for 64 bit (right-click register)? Instead start C:\Windows\Syswow64\CMD.exe as administrator (right click run as administrator) then use that to register it
cd "C:\Program Files (x86)\ACP Obs Control\WeatherComponents"
regsvr32 MyServer.wsc
Now it should be visible