Render Elements Problem

[mini_vin]

Hi everyone im a new user of mental ray

i have a big problem when i try to use render elements with mental ray shaders

for example

I have a scene with scanline shaders and a volum light when i use render elements all are okey, but when i merge my character that have sss skin material + displacement and render with mental ray start all the problems, first the element channel that renderer the shadows diffuse and all the elements that have mental ray shader render in black all the scanline shaders are ok, the same problem i have when i try to render the atmospheric element this render in black to but when i renderer whith the scanline render its ok please help me with this topic

thank for all