Specular Bump not working

I want to apply a specular bump to a spaceship model which have a lot of "white glow window", something like this:
http://img2.wikia.nocookie.net/__cb...e/images/thumb/5/55/Akkan.jpg/256px-Akkan.jpg
I had some research and found this:http://answers.unity3d.com/questions/306921/add-specular-map-to-shader.html but it didnt work with me, the ship window not glow highlight.

can anyone tell me what I do wrong here?

PS:sorry my bad English.

 

All right, it seem the o.Gloss and o.Specular didn't work and i 'd found a way arround this:

Code (CSharp):

1. void surf (Input IN, inout SurfaceOutput o) {
2.     fixed4 tex = tex2D(_MainTex, IN.uv_MainTex);
3.     fixed4 specTex = tex2D(_SpecMap, IN.uv_SpecMap);
4.     o.Albedo = tex.rgb * _Color.rgb +  _Shininess * specTex.g;
5.     o.Alpha = tex.a * _Color.a;
6.     o.Normal = UnpackNormal(tex2D(_BumpMap, IN.uv_BumpMap));
7. }

instead of:

Code (CSharp):

1. void surf (Input IN, inout SurfaceOutput o) {
2.     fixed4 tex = tex2D(_MainTex, IN.uv_MainTex);
3.     fixed4 specTex = tex2D(_SpecMap, IN.uv_SpecMap);
4.     o.Albedo = tex.rgb * _Color.rgb;
5.     o.Gloss = specTex.r;
6.     o.Alpha = tex.a * _Color.a;
7.     o.Specular = _Shininess * specTex.g;
8.     o.Normal = UnpackNormal(tex2D(_BumpMap, IN.uv_BumpMap));
9. }

but i have no idea with the Gloss and Specular use for.