Exporting problem with armatures

I have a model in which I have one base-bone,and several child bones. I tried to export it for use in XNA via the directx8 exporter. I am getting the following error message from the blender console.

File “C:\Documents and Settings***\Application Data\Blender Foundation\Blender.blender\scripts\Directx8Export er.py”, line 770, in writeTextures for face in mesh.faces:

AttributeError: ‘Armature’ object has no attribute ‘faces’

I tried doing the fbx export optimized for xna

it exports ok, but then xna gives me the following

"Multiple skeletons were found in the file. The first skeleton, named “Bone” has been moved to be a child of the scene root. The other, “Bone_0”, will be ignored.

“Error normalizing vertex bone weights. BoneWeightCollection does not contain any weighting values.”

any help?

Again, I have one big bone in the system that acts as a base, then several disconnected child bones throughout the model. I have tried multiple times to parent the child bones to the base-bone, but it doesn’t appear to be working as when I go into edit and look at the properties it says “child of” but then is blank.