Working for me. (don't you just love it when the other guy says that :)

My animation using the P4 Casual Man is:-

Frame 1
T position, all hip translations zero

Frame 30
Arms by side
hip Y rotate 90
hip X translate 1.000 Poser Units
hip Y translate 1.000 Poser Units
hip Z translate 1.000 Poser Units

Exported using Poser BVH export then used the script.

These are my files:-
http://www.philc.net/temp/BVH/