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
		{
			ambient 1 1 1
			diffuse 1 1 1 1
			specular 0 0 0 20
			emissive 0 0 0

			texture_unit
			{
				texture default.jpg
			}	
		}
	}
}