No one can connect to my server!

Ok whenever I make a Bukkit server it says:

[INFO] Starting minecraft server version 1.5.2
[INFO] Loading properties
[INFO] Default game type: SURVIVAL
[INFO] Generating keypair
[INFO] Starting Minecraft server on ***********:25565 [WARNING] **** FAILED TO BIND TO PORT!
[WARNING] The exception was: java.net.BindException: Cannot assign requested address: JVM_Bind
[WARNING] Perhaps a server is already running on that port?

I have tried every possible solution; restarting my computer, re-installing Bukkit, and leaving the server-ip blank. If there are any other solutions please tell me. By the way I'm using port forwarding and I know for a FACT I'm port forwarding correctly, could it be my router/modem?

 

Look is you internet working good install newest java and its works i think

 

I already tried to install the latest java.