How do I keep bones/image still when panning?

[gphpgl]

I have a long background, and I pan the camera from right to left, but I want to keep the sun in its place. This is OK: I put a linear keyframe at the end of the pan and move the sun layer back. But when I make a bone layer to animate the sun, the bones follow the background. If I move the bone layer, the sun layer moves with it. How can I keep them together?

[slowtiger]

Set sun bone layer to "immune to camera movement".