Please help - Perhaps a server is already running on that port ?

Hello.
I have a very popular server but recently i loaded up my bukkit console and this error came up:
[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 ?

So i have tried everything - Removing the ip from server.properties the console works fine but then i cnt get on my server it says: Connection : refused

*NOTE* I have portforward my bukkit and it was working untill today..*

I have searched on every site but still no answer
Please help
Many thanks -Adam

 

hmm, my console told me that once. The first time it was because i already had another console open running the server. and that was an easy fix. But the second time I tried restarting my router (restart not reset) and that fixed it. also try restarting your comp. or maybe your IP changed

 

http://forums.bukkit.org/threads/troubleshooting-common-problems-with-solution.44590/