Are you animating from the BODY, or from the hip or another body part?

BODY channels aren't automatically saved in pose files ... one of those annoying #@$%& quirks that I wish CL would change in the next version of Poser. I've grown weary of cutting-and-pasting from scene files.

oh one more question do i need to select subset on what to save in it?

Did you actually keyframe the pain prop, or is it simply coming along for the ride? If the latter, I wouldn't bother with subsetting.