Direction light shadows are not casting after baking lightmapping

Following Stealth TUT, I have a directional light that casts shadows normally but after I bake lightmaps, directional light does not cast shadows anymore, any ideas ?
In that tutorial, the tutor added all of lights then baked them, then after baking finished he added the directional light (I do not know why does not he want to bake it) for him, it casts shadows and for me, it does not, it only casts shadows before baking.

I don’t know that tutorial but that’s how it works. That’s why he is adding it after the bake. Make sure that your light to cast the shadows is set to “Auto” under lightmaping and set as important under Render mode. What shaders are you using?