Image Texture with multiple materials applied to an object?

OK, so I have a model with several different colored materials assigned to different vertices on the model (the model is all one object). There’s one section of the model I want to add an image texture to. I selected the material for that section and added in image texture, UV Mapped it, but when I render, the image doesn’t show up.
Any ideas?

Is the mapping set to generated or UV? You might have to upload a blend or post some screenshots of the settings.

See attached blend with multiple materials and image texture, I have the mapping panel open on the right hand side.

Attachments

cube.blend (531 KB)