I changed the position of light but nothing changed

Note : I tried the "CgShader" component after I changed some parameters and it's work in one design but the other it doesn't work it's just make the color of the character black

I think my problem with Shades not with light , I mean I have to add a shades to the character but I don't now how ..

is there any another way to do like "CgShader" component do??

thanks