I've applied normal maps to two surfaces in the attached image. One is the red tentacle looking shape and the other is the blue tube that wraps around the disc. I can't see any texture in those objects. I used the exact same method to apply a normal map to the disc and you can see the texture applied there. I don't know why it works on the disc in this picture but not on the red tentacle or the tube. The only difference afaik between the disc and the two objects that aren't displaying textures is that they are both sort cylinder shaped.
What am I missing or doing wrong?