Problems with Textures on Blender Models

I'm having a problem with applying textures to blender (.blend) models in Unity 5. As you can see, I've applied a material with the texture "scratched-metal", but instead of showing scratched metal on the model, it shows a grey color similar to the texture, but not the real texture. I've tried changing the tiling, trying different textures, every single option I could think of in the materials menu but still nothing seems to work.

I'm new to Unity so any reply would be very helpful.

Thanks,
possiblyfamous

 

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