Sounds like a possible port-conflict, see if you can verify with netstat or TcpView.
checked it with netstat..just didnt listen on port till restart
Sounds like you might need to check one of the ePO logs for errors. epoapsvr.log, server.log or orion.log - not sure which might be appropriate here.
Bear in mind they are time-limited and will roll over when they hit a certain size.