[HELP NEEDED] Can't enter the server!

[Matrix31]

Greetings.

My friend's been having troubles entering the Discovery FL server. The problem occurs in the very menu where servers are listed. When he clicks to join the Discovery FL server, it kind of lags out for him, and after a while he gets that message that he was unable to join possibly due to the server being down or his connection..

His Internet runs smoothly and he IS able to join any other server on the list. The problem occurred some time earlier for him, but it seemed to have solved itself on a few occasions.
Btw, he tried reinstalling the game and the mod, shutting down his antivirus, reinstalling Windows.. Nothing helped. The problem continues to persist and has been plaguing him for 2 days now.

Any help or suggestions would be greatly appreciated!