Want to replace the Grafic of trees , but it doen`t work

[Babuu]

Hey guys, i got a problem.
I want to replace the grafic of trees with the crystal doodad in order to achieve that workers are able to gather minerals(crystals) instead of trees.
Now .. i took the Ashenvale tress and exchanged the grafic file.. in the exporter everything looked fine

http://img48.imageshack.us/img48/4576/question1jy0.jpg

....
But in Game, there are just the shadwos and the collision, no visible or selectable models...

http://img165.imageshack.us/img165/5718/question2ju3.jpg



Can anyone help me?
I need my workers to gather minerals ;-)

 

[ArchWorm]

Try removing replaceable texture file.