probs with custom Models

[DonProtz]

Hi there,
i have model a wall, can see the model in the modelviewer (all fine) can place it with modeleditor, but in game the wall is not there. any ideas?

second case ^^
I have deleted a wall.dae in the folder masionbase (was a accident) than i replaced the whole folder "/mansionbase/wall" from a new install of amnesia that I installed on different disk. Now the editor from the first install crash every time when i hit in the menu "static objects - mansionbase"! The other folders are okay and I can select the obj and place them regular.
I hope someone can understand my explanation.

Thx for your help.