Fastdl on local server

I’ve readed somewhere that it isn’t possible to have an fastdl working with an srcds server on the same machine. Is that true? Since I have my server and it doesn’t seem to want to download when people join…
Here’s the link:
Can someone explain if I’ve done anything wrong? This is some of my server.cfg:

Is Perp legitimately for sale? Anyways, change sv_allowupload and sv_allowdownload to 1, not 0.

No, they should be 0.

Do you have a resource.AddFile lua file?

if your hosting local perp on your own computer, you’re gonna have a bad time