My friends can't join my Bukkit server!?Please Help!

I created Minecraft Bukkit server few days ago.I can join it,but my friends can't,it says to them: ''Timed out'' or ''internal excepition: io.netty.handler.timeout.readtimeoutexepition'' i did everything right,well i think so, i am using windows 7,i portforwarded, i can join to my server only with IPv4,and i cant with localhost,i turned off online mode, i added 6 plugins to...Please,help me i dont know what to do !!

heres my propertis of server #Minecraft server properties
#Sat Jul 12 22:41:11 CEST 2014
generator-settings=
op-permission-level=4
allow-nether=true
level-name=Assassin'sCraft
enable-query=false
allow-flight=false
announce-player-achievements=true
server-port=25565
level-type=DEFAULT
enable-rcon=false
force-gamemode=false
level-seed=
server-ip=25.126.154.19
max-build-height=256
spawn-npcs=true
white-list=false
spawn-animals=true
snooper-enabled=true
hardcore=false
online-mode=false
resource-pack=
pvp=true
difficulty=1
enable-command-block=false
player-idle-timeout=0
gamemode=1
max-players=20
spawn-monsters=true
view-distance=10
generate-structures=true
spawn-protection=16
motd=A Minecraft Server

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Offline mode is not supported. Would recommend changing that.

 

yeah,but i have cracked acc,so i cant with online mode pleasee help!

 

Locked. We do not support servers with authentication disabled.