Hmmm...........have you a light in the scene or just using the default lighting? Try giving a color to the object and put a light in the scene and let me know what happens.
Reason for the texture box...you can map a texture as a glow pattern 
Darkon
Red bellows of flame have blackened my stones
Convulsing my frame and cracking my bones
Hell's dragons of steel who roar in their chains
Crawl into my caves to suck out my veins.....
-The Mountain P.F.M.