I followed the demo shown on: https://github.com/watson-developer-cloud/conversation-with-discovery. Everything works fine in the demo. When i tried to use my discovery collection , it gave the error “Service seems to be down.Please try again after sometime or Please check the logs” and the local(wlp) server stopped. Attached the console log. Where is the problem?

I used the workspace as used in the demo and changed the “Out-of-scope” intent questions. It retrieves answers from the conversation but not from the discovery?link text