Try setting the "Version" number to 4 or 5 so it won't argue version with everyone else and make sure it IS a pose file extension.  Beyond that, I'm clueless.

I cannot save the world. Only my little piece of it. If we all act together, we can save the world.--Nelson Mandela
An  inconsistent hobgoblin is the fool of little minds
Taking "Just do it" to a whole new level!