At the risk of getting my hand slapped again, this should cover a lot of what you're trying to troubleshoot:
http://www.archaicarcane.com/fly-lit...-nests-part-1/
part 2 is relevant if part 1 doesn't help.
Note to any mods: I'm not selling anything on my site, there are no opt-ins and per the rules there's a link back to the QB.