It's probably best to start a new thread if the alert did not work properly. However, I think the alert did work, you only got connection refused, which didn't seem appropriate to you. Is that correct?
If the server/application did go down, connection refused doesn't sound odd at all to me, but maybe I am misunderstanding the situation. Maybe you could explain a bit more about the actual alert in the other thread, if you feel it is warranted.