If the problem is that texture is displayed, but not the template, it could be one of the following situations.
1.UV coords out of range.
Sometimes UV coordinates are higher than 1 or lower than 0 for tiled textures.
If such is the case, you won´t see any template on your texture.
UV values that are displayed by MW range from 0 to 1.
2.Selected group isn´t using that texture.
If you have a texture on screen and you press the group template, it may display nothing if the selected group uses a
different texture or no texture. You can assign a texture to a group at the Information screen - Groups data, where you can
edit groups data directly.
3.No texture appears when selecting a texture name or selecting a group that has a texture assigned to it
If the problem is that it doesn´t display any texture at all, it is because MW looks for the textures in BMP format in the
directory specified in the settings screen. So you'd need to convert them to BMP and place it in that directory.