If I had to guess, EADDRINUSE could be "Error, address in use"... It looks like you set the port to 80, which might be taken by another program like Skype. I'd try to change the port to something with 4 digits since some of the lower ones are reserved. I have mine set to 4237, which might be the default value since I don't think I've had to change it.
Another thing to try after changing the ports (if that doesn't work) is the 32-bit version of Superpowers. Last time I used the 64-bit version, I was having random disconnection issues.