Platinum Arts Sandbox - Free 3D Game Maker Forum

I've been trying(highly unsuccessfully) to export an animated door model I've been working from Blender to Sandbox. I've looked at the tutorial(by this i mean stared at frustratedly for a hour) and I'm still unsure how to "Parent the tag to a bone Control P". It gives me an error message: "Needs an active bone". I'm trying to get my head around it but decided i need some help any ideas?

Have you seen the forum tutorial by Daniel_san? I thought he did an excellent job with it though if that doesn't work for you there is another one in the wiki. Take care.
-mike