lighting not working

Support Materials and Textures
1

Hello
I have a single object that was jointed by ctr-j , when i switch on the shaded drawing type, the light only lights some parts of it while ignoring completely the other, What’s going on?

2

Editmode>select all verts>Ctrl+N to recalculate normals outside.

3

hello
the problem is not with the normal , i already check that , see this
http://picasaweb.google.com/juliusctw/ArtWorkingProgress/photo#5059710356093597074

  even with the normals all correct, when i turn on the light, only certain parts are lighted

http://picasaweb.google.com/juliusctw/ArtWorkingProgress/photo#5059710360388564386

 this is why it is so confusing for me,  i think i did something with link material, (which i have no clue what it does)  i think somehow that's the problem. Any suggestions.
4

Ok, i solved the problem, i was just linking crazy materials all together, it worked again when i delete the material and start over.