[My Tekkit (8 versions late?) wont update apparently]

How do I update r20?

[People cannot connect to my Tekkit Server.]

Someone please help me!

[People cannot connect to my Tekkit Server.]

I'm having a massive issue getting people to connect to my Tekkit Server. I can connect and play just fine but when other people try the IP, they get "Can't reach server".

This is my Server.cfg:

allow-nether=true

level-name=Tekkit Sever LDR

enable-query=false

allow-flight=true

server-port=25565

level-type=DEFAULT

enable-rcon=false

level-seed=

server-ip=

max-build-height=256

spawn-npcs=true

white-list=false

spawn-animals=true

online-mode=true

pvp=true

difficulty=1

gamemode=0

max-players=20

spawn-monsters=true

generate-structures=true

view-distance=10

motd=Tekkit Server LDR

We are linked through Hamachi as well.

I've allowed Hamachi in my FireWall.

I'm not sure what else I can do.

P.S. This is my first server, so I'm kinda nooby. And I only made this server recently.

How do I fix this?