second pass of my custom shader does not influence after light map shader

with the light map pass: why cant see blue color on the ball

without


Pass{
//Name "FORWARD"
//Tags{ "LightMode" = "ForwardBase" }
//Tags{ "LightMode" = "ForwardAdd" "SHADOWSUPPORT" = "false" }
//Blend One Zero
ZWrite [_ZWrite]
//LOD 100
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma fragmentoption ARB_precision_hint_fastest
#pragma exclude_renderers d3d11_9x d3d11
#pragma multi_compile_fog
#pragma multi_compile LIGHTMAP_OFF LIGHTMAP_ON
#pragma multi_compile_fwdbase
#include "UnityCG.cginc"
#include "AutoLight.cginc"
#include "Lighting.cginc"
sampler2D _MainTex;
struct appdata
{
float4 vertex : POSITION;
half2 texcoord : TEXCOORD0;
half2 texcoord1 : TEXCOORD1;
};
struct v2f {
float4 pos : SV_POSITION;
half2 uv : TEXCOORD0;
half2 lightmapuv : TEXCOORD1;
UNITY_FOG_COORDS(2)
};
v2f vert(appdata v)
{
v2f o;
o.pos = UnityObjectToClipPos(v.vertex);
o.uv = v.texcoord;
o.lightmapuv = v.texcoord1.xy * unity_LightmapST.xy + unity_LightmapST.zw;
UNITY_TRANSFER_FOG(o,o.pos);
return o;
}
fixed4 frag(v2f i) : COLOR
{
fixed4 color = tex2D(_MainTex, i.uv);
#ifndef LIGHTMAP_OFF
fixed3 lightMap = DecodeLightmap(UNITY_SAMPLE_TEX2D(unity_Lightmap, i.lightmapuv));
color.rgb *= lightMap;
#endif
UNITY_APPLY_FOG(i.fogCoord, color);
return color;
}
ENDCG
}