Great problem with campaign items and doodads

Could anyone tell me why the HELL campaign items I create and put into a map simply disappear when I play this map??! Then I create a custom item (not campaign) and voilá! There it is! Could anyone tell me what's wrong?!?

Hrrmmm.. I've never encountered this problem. Try resetting the Unit Data to defaults perhaps? export it first so you don't lose anything...

Do they have to be campaign items, then? Just set them to level 0 items. Most campaign items are level 0 anyway.