fail to load a heightmap

Hello I was trying to write a step by step report to figure out what was my problem, it starts like this :


outside of torque :

i created a heightmap from datas from google earth using microdem.

Inside of Torque :

Step 1 : click on new project in Torque Toolbox
Step 2 : Name it Mountain
Step 3 : open the project
Step 4 : delete the existing terrain
Step 5 : Click on File
Step 6 : Click on import heightmap
Step 7 : Browse the correct file
Step 8 : Name it newMountain
Step 9 : Click on import (my heightmap is on my desktop)

then is shown "failed to import terrain! Heightmap failed to load!"

I remember somewhere that I had to enter a line in the command prompt to allow torque to read external files, I think. Is it the problem ? What is this command line ?

Thank you.