Models i import have no shadows

Lighting maps on imported models arent working or something , whenever i place a new model it doesnt display any shadows when i build the light ![][1]

Here is a picture of how it looks when the light isnt built

and it has shadows correctly

but when i build the light the shadows dissapear

I have no idea what am i doing wrong :frowning: , please help me

Hey, can you show the lightmaps of the ground you are using? Because that’s where the shadow of your mobile phone will be saved.