I already try to move the both light away and change the ambient, diffuse, etc parameter.. But, the result still same. And if I try to reduce the parameter value from shininess in OpenGL, the glow will reduce too, but my shadow will not seen clearly. I so confuse how too make it right.

Or maybe I have a wrong blending method... Now I using OpenGL blending method with GL_BLENDFUNC... And I use GL_ONE for the source and GL_ONE too for the destination.. Is I have wrong blending function???