Noone can join my server...

yep it's a network problem
I'll try to explain...
some one who want connect your computer must have your ip adress
but the IP of your computer is not the same as the router one

if someone want to connect you he enter the ip of your router
he connect to your router but no server on the router   the server is on your computeur

so you have to tell to your internet box that you want to redirect computer who connect to her  to your pc.

for the rest :s  on my computer you have to go in NAT-SETTING
but all box are not the same :s

if you are on windows you can have the ip adress of your computer execute=>cmd=>ipconfig

here the config of mine

hope that is helpfull

thanks I'll change root for router ^^

Okay, I changed the access-IP for the TW-server.
Now it works again.