JVM_BIND error, Port is forwarded. Server just stopped working some day

Hello, i've ran a bukkit/vanilla server since march 2011. I stopped hosting it because i got this error: 'java.net.BindException: Cannot assign requested adress: JVM_BIND'
I'm pretty sure i've forwarded my ports right, according to that the server ran fine untill some day.
In this period, i got a new router, which didn't solve the problem.
Also, i've tried hosting the server on my (way too slow...) laptop, which worked fine.
So this is probably my PC being a douchebag. Still, i'd like if someone could anwser why this happens and, especially, how i can fix this.

Running windows 7 32 bit
Using java JRE 7
Running on bukkit build 1502 (also occurs at any other build and even on vanilla)
Just a clean server
also i can't get on it because of the server doesn't start, but just hangs at the error i mentioned above

Video:
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