Cannot use imported models in campaign

Hi all, I got a new problem for my campaign.
I import a model to the campaign import manager and then use it in the campaign object editor.
Then I load one of the maps, and place that unit/doodad/whatever and push "Test Map".
The model looks fine in WE, but when I get ingame it's just a greenbox :/

I tried to instead import the model directly into the map and use it there, and then it works fine both ingame and in WE.

So my question, what should I do to make it work ingame? It must be possible as other people have done it.

btw, Ive tested to go into wc3, singeplayer, custom campaigns, and load the map from there, still green boxes.

EDIT: Problem solved