post your onspawn and OnConcersation scripts. Make sure that you get the ones that your creature are using in a spawned in condition.
The simplest way that I can think of to make sure that you get the correct scripts is to make a copy of your spawned in creature.
(A simple custom widget to copy the creature should do.)
Save the game.
Open the saved Game in the toolset by right-clicking on it, selecting 'Open With...' and browsing to the toolset.
inspect you creature to make sure that is it using the scripts that you think it is.
If you need help with the custom widget, post back for help.