Question online-mode=false doesn't work

[Lightburg]

It's been a whole week since I started a SMP. One of my friends doesn't own Minecraft and since there is online-mode that I can set to false I should be fine but no. It doesn't work. I tried using every server.jar I could possibly find but it hasn't worked yet. I had to delete everything and start a new server which I still haven't joined. Please help me make my SMP cracked once and for all.

 

[Machine Maker]

Offline mode isn't supported here on Paper support channels.