Ok Azadeegan,
Please download this zip I'm attaching in my post,after extracting it somewhere,copy the file inside it and paste it carefully to the following directory:
Programfiles/SEGA/Medieaval II Total War/CloudsAcrossEurope/data/unit_models/units/me_light_padded/textures
After that try again please tell me the results,I'll probably have to upload the mod again....