problem in making a material plug in

hello all!

im new to scripting...
recently i was making a script for v-ray car paint

but on compiling ... the material dont appear on material slot... :(

heres... it

plugin material V_shader
name:"V-style shader"
classid:#(0x4a8b48c4, 0xe2b2078)
extends:standard replaceui:true
(
rollout harami "V-style shader main parameters"
(
group "Main parametes"
(
colorpicker car_col "paint color"
colorpicker ref_col "reflection amount"
)
)

parameters main rollout:harami
(
color type:#color default:[151,151,151] ui:car_col
color1 type:#color ui:ref_col
)

on create do
(
delegate = shellac()
delegate.shellacmtl1 = vraymtl()
delegate.shellacmtl1.name = "base"

delegate.shellacmtl1.texmap_diffuse = rgb_tint()
delegate.shellacmtl1.texmap_diffuse.red = [0,0,0]
delegate.shellacmtl1.texmap_diffuse.green = [0,0,0]
delegate.shellacmtl1.texmap_diffuse.blue = [0,0,0]
body_color = delegate.shellacmtl1.texmap_diffuse.map1 = output()
delegate.shellacmtl1.texmap_diffuse.map1.map1enabled = on

delegate.shellacmtl1.texmap_reflection = falloff()
middle_reflection = delegate.shellacmtl1.texmap_reflection.color1 = [0,0,0]
outer_reflection = delegate.shellacmtl1.texmap_reflection.color1 = [255,255,255]
delegate.shellacmtl1.texmap_reflection.type = 2

delegate.shellacmtl1.texmap_reflectionglossiness = falloff()
specular = delegate.shellacmtl1.texmap_reflectionglossiness.color1 = [255,255,255]
outer_reflection = delegate.shellacmtl1.texmap_reflectionglossiness.color2 = [0,0,0]

delegate.shellacmtl2 = vraymtl()

delegate.shellacmtl2.texmap_diffuse = rgb_tint()
delegate.shellacmtl2.texmap_diffuse.red = [151,151,151]
delegate.shellacmtl2.texmap_diffuse.green = [0,0,0]
delegate.shellacmtl2.texmap_diffuse.blue = [0,0,0]
--delegate.shellacmtl2.texmap_diffuse.map1.map1enabled = on
paint_color = delegate.shellacmtl2.texmap_diffuse.map1 = output()

slight_reflection = delegate.shellacmtl2.reflection = [255,255,255]

delegate.shellacmtl2.reflection_fresnel = on

delegate.shellaccolorblend = 100
)

)

and on selecting the material... theres no change in the material slot :(

see the pic
http://www.imagebam.com/image/0d1ab424080168

thankyou in advance.