FML missing message not appearing

[Technix]

I am running Cauldron but they told me to report it here so I am. When people with the vanilla client try to join my server, it just says logging in and then that is it. There is no message. What is going on?

[LexManos]

We need actual logs, it should kick you just fine if you time out without sending the FML identifier.

Make sure you use JUST Forge/FML as we only support our distributions.

[Technix]

This is what happens when someone tries to join:

 

[11:29:32] [user Authenticator #1/INFO]: UUID of player WhovianMan is 1bd9700a-dea8-4e67-9a0e-ae73170f87b9

[11:30:09] [server thread/INFO]: WhovianMan lost connection: TextComponent{text='Disconnected', siblings=[], style=Style{hasParent=false, color=null, bold=null, italic=null, underlined=null, obfuscated=null, clickEvent=null, hoverEvent=null}}

[11:30:09] [server thread/INFO]: WhovianMan left the game

 

And they do not get a message about you needing FML installed. I remember in 1.6.4 there was a message.