Rig with joined objects I have followed some tutorials and created a nice cartoon looking shoe. That shoe has three different objects(shoe itself, shoelaces and lace holes). I joined them together and everything was fine until i wanted to test rigging. when i added some bones for testing those laces and holes doesn't deform with the shoe. what might be the problem?

Without Rig:



With Rig:
The problem are weights. each part of the mesh gets weights automatically by assigning the armature modifier, but these don't work with intersecting objects like yours. It's almost impossible to assign proper weight to cloth details like this manually.
To solve it, try to use Mesh Deform modifier: 


make a very simple mesh around your model.
add Mesh Deform to your original model, bind it with your mesh.
add bones to your simple mesh.