dds-file problem _earth_mars

[Bob]

I don't know what I'm doing wrong but I can't get highres texture to work.
I've been trying serveral times to put the ddsfiles into the texture\medres map but when I start Celestia You only see a bad texture.
It seems that the program cant read the highres files.
I have the latest version of Celestia.
I have Asus Geforce 4 Ti V8420 graphic card. I can view these file by using the Asus VR picture Viewer.
Is there anybody who can help me before I get insane.

[Buzz]

Did you change the name for the texture in /data/solarsys.ssc? Look for "Earth" "Sol"
{
Texture "earth.png"

and change earth.png to [name].dds