Bad importing 3D objects (no textures/skins appears!), what could I do?

Hello, I'm trying to import 3D objects like 3DStudio / Blender ones, but I can't see right colors in theme. In what I experienced it seems like textures were not correctly loaded, very strange because I imported one single file with no other directory or extensions.

Here some few examples:

http://img408.imageshack.us/img408/3884/schermata20101123a19483.png

or

http://img40.imageshack.us/img40/1840/schermata20101123a20131.png

Could you help me please solving this problem? Thanks, salvatore

Look at this answer http://answers.unity3d.com/questions/28511/how-to-solve-a-unity-fatal-error try it

See this link: http://unity3d.com/support/documentation/Manual/Meshes.html It explains where Unity tries to locate textures.