Terrain bumped specular material not working

$$anonymous$$,

i want to apply normal maps to my textures on the terrain. i created a Nature/Terrain/Bumped Specular material and applied it to Terrain Settings> Material slot but i don't see any change in the terrain. all the textures i added to the terrain have normal maps (created /w CrazyBump).

i've checked everywhere but no one else seems to be having t$$anonymous$$s problem

thanks in advance