I have began to make my own server, but every time i open up the minecraft server jar file i get this:

Starting minecraft server version Beta 1.3

**** NOT ENOUGH RAM!

To start the server with more ram, launch it as "java -Xmx1024M -Xms1024M -jar minecraft_server.jar"

Loading properties

Starting Minecraft server on ************:25565

**** FAILED TO BIND TO PORT!

The exception was: java.net.BindException: Cannot assign requested address: JVM_Bind

Perhaps a server is already running on that port?

i have no idea what to do with this "java -Xmx1024M -Xms1024M -jar minecraft_server.jar"

its to determine the RAM..

use bukkit bro..