Light through objects and missing shadow

Hey folks,

have a look at the image. I have a problem with spot lights and it seems they dont cast a shadow AND they pass through the object in here. Also you can see the light settings i have made so far. I really find no clue, how to deal with this problem. It should cast a shadow and it should not pass through the pillar :(

I would be very happy for any hint. Thanks a lot!