alpha not working

material_alpha.material

material tv/frame
{
	technique
	{
		pass
		{
			ambient 0.215686 0.215686 0.215686
			diffuse 0.215686 0.215686 0.215686 1
			specular 0.172549 0.172549 0.172549 70
			emissive 0 0 0

			texture_unit
			{
				texture EnvmapPlan.jpg
				colour_op_ex blend_manual src_texture src_current 0.3
				env_map planar
			}
		}
	}
}
material tv/video
{
	technique
	{
		pass 01
		{
			lighting off
			scene_blend add
			depth_write off
			
			texture_unit
			{
				tex_address_mode border
				tex_border_colour 0 0 0 0
				scale 1.05 2.05
				scroll 0 0.25
			}
		}
		pass 02
		{
			lighting off
			scene_blend modulate
			depth_write off
			
			texture_unit
			{
				tex_address_mode border
				tex_border_colour 0 0 0 0 
				scale 1.05 2.05
				scroll 0 -0.25
				
			} 
		}
	}
}