2d shader transparenct issue

[long_gone]

Hello there everyone, when I render with shader my 2D HUD texture' origanally trasparent parts of it get filled with white color.

struct VS_INFO
{
	float4 position : POSITION;
	float2 coord : TEXCOORD;
};

VS_INFO main_vs(VS_INFO input)
{ 
	VS_INFO output;
	output.position = input.position;
	output.coord = input.coord;

	return output;
}

uniform texture2D g_texture;

sampler2D g_texture_sampler =
sampler_state
{
	Texture = <g_texture>;
};

float4 main_ps(float2 uv : TEXCOORD0) : COLOR
{
	float4 sourceColor = tex2D(g_texture_sampler, uv);
	return sourceColor;
}

technique T0 
{
	pass P0 
	{
		VertexShader = compile vs_2_0 main_vs();
		PixelShader = compile ps_2_0 main_ps();
	}
}

 

I want 'em(parts) to be transparent after they  have been rendered with shader