Drawing shape with GL but Shader is drawing over every oject

I am having and issue with the shader. Im drawing a shape with GL . but I want a transparency effect My current version of the shader is

 public static Color color = new Color(0,0,0,0.3f);
 static void CreateLineMaterial(){
             if( !lineMaterial ) {
                 lineMaterial = new Material( "Shader \"Lines/Colored Blended\" {" +
                                             "SubShader { Tags { \"RenderType\"=\"Transparent\" } Pass { " +
                                             "    Blend SrcAlpha OneMinusSrcAlpha " +
                                             "    ZWrite On ZTest LEqual Cull Off Fog { Mode Off } " +
                                             "    BindChannels {" +
                                             "      Bind \"vertex\", vertex Bind \"color\", color }" +
                                             "} } }" );
                 lineMaterial.hideFlags = HideFlags.HideAndDontSave;
                 lineMaterial.shader.hideFlags = HideFlags.HideAndDontSave;
             }
         }

IF i remove the blend line in the pass tag. it draws an opaque shape. the two version are below first with the line and second without the blend line in the pass tag.

I want the the effect like the first image but it draws over everything. I want it to be over the groudn and some other objects. I change the ZWrite to on and Ztest To LEqual. Still its the same. Any Idea whats wrong ?