[Xymon] Xymon alerting on acknowledged events

Hi all,

Our xymon server seems to disobey acknowledged events and still alert anyway. If we mark it blue to disable the service it will stop alerting us. We've seen this behavior before a long time ago and the fix was possibly a missing directory or something to that effect but we cannot seem to find it on Google nor locate it in our notes / ticketing system. Too much noise in there from the word "xymon".

Any hints?

Thanks