I had the same problem when i made my first game and i fixed it somehow
here are some things that could fix this :
-Add the HUD to another layer (if you haven't allready)
-Set the initial visibility for the layer to visible
-Set the layer transparent to yes
-Set the HUD objects Initial visibility to visible
-Place the HUD somewhere in the windows sight(top left corner has a square)
OR
-Place the HUD close to the player (if you have the scroll to behavior)