Board Thread:Game Help/@comment-26037168-20150123233619

I'm on Xbox One. I defeated Skeletron and went down into the Underworld. I can open gold chests just fine with keys but shadow chests won't open. I have the shadow key. I even had 2 shadow keys with a chest trying to give me a 3rd. Now is there something special I need to do to open shadow chests? Some boss that needs to be defeated first or anything because I've tried on 3 chests and nothing happens. 