[MDL ED] Google Sketchup 8?

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When I imported the mesh I couldn't see anything. So I clicked all over the screen until I pressed a box without any texture or anything.

So the mesh is there but without textures? If so, are the textures in the same location as the DAE file? If so, you need to make a material file that references the textures, with the same name as the texture (use the material editor to do that).