I was having this same problem and spent most of thisafternoon tracking
it down. It seems the problem arises from thefact that the factory
instance doesn't touch the fill, sync, etcmethods. For some reason, flex
interprets not using certainproperties of a ConfigMap object as a fatal
however which seems alittle odd.In this case though, it is correct
because the sync and fillmethods actually aren't getting set on the
underlying java adapter.This isn't a problem if you use the the
Assembler approac...