Casting a Spotlight

Hi,

I'm just getting into lighting and light mapping in my level and are trying to make spotlights from my lampposts to shine on the ground and cast shadows but nothing shows up on the floor, I've got the intensity and distance high enough and the shader is mobile vertexLit, tried other shaders to with same results.

Is it possible to do this ? If so what am I doing wrong ? Any help would be appreciated.

Thanks.