Hello its surferdude999 wanting some help here. Well when i start my server for some reason it says this and i don't know why.

/Users/zachdrexler/Desktop/server/start.command ; exit;
182 recipes
27 achievements
17:18:20 [INFO] Starting minecraft server version 1.2.5
17:18:20 [INFO] Loading properties
17:18:21 [INFO] Starting Minecraft server on 68.45.94.9:25565
17:18:21 [WARNING] **** FAILED TO BIND TO PORT!
17:18:21 [WARNING] The exception was: java.net.BindException: Can't assign requested address
17:18:21 [WARNING] Perhaps a server is already running on that port?
>

please help. Comment the answer if you know it.