I'm trying the WiseGuy sample app in Java and can get Alexa to say "knock knock" but then the light turns off and that's it, I don't get to say "who's there".
Same issue with my own skill, even though I'm using newAskResponse(). Is there anything else I need to do?
Fixed it by using the jar file produced by Maven instead of directly using the source code. Not sure why that makes a difference.