[Penetal]

I seemed to have to set up my fastdl server with the same filestructure as the game.
I had example.com/maps example.com/materials example.com/sounds etc etc which didn't seem to work.
When I changed it to reflect the game such as example.com/csgo/maps example.com/csgo/materials etc etc, and set sv_downloadurl to example.com/csgo it seemed to work for me. Hope that helps.