Server rentals :: NFOservers.com

I still get the same error, as I tried that too earlier. Does it have to do with my personal firewall on my computer?

Info:
CentOS
Bukkit

Server.Properties:
#Minecraft server properties
#Wed Apr 17 02:54:22 EDT 2013
generator-settings=
allow-nether=false
level-name=world
enable-query=false
allow-flight=false
server-port=25565
level-type=DEFAULT
enable-rcon=false
level-seed=
server-ip=
max-build-height=256
spawn ...