In that case... Check the console (in Source) for errors, regarding missing materials or not being able to load this or that texture as it doesn't exist.

A few trouble-shooting hints:
Are you using $CDMaterials in the QC, and are the materials in said folder?
Do you say texture name (scout_blue) in the materials, or path and texture name (models/player/scout_blue)? (You should use path and texture name.)
How much do the textures fill? (Source doesn't read textures above 64 megabytes or such.)

i compiled the model in blender and the textures are in the folder

That doesn't answer my questions.