Some Bvh's that could not ever be opened in poser , are now useable after i rename the body parts to the corresponding poser body parts.  However, since the original bodyparts are more than the poser ones.. the animation turns weird

Example I use james

but the bvh has things like

UPPERNECK
LOWERNECK

THORAX
UPPERBACK

HIP
LEFTHIPJOINT
RIGHTHIPJOINT

So, what i do is just reuse the same poser bodypart name. like
upperneck, lowerneck use the same NECK. HIP, LEFTHIPJOINT, RIGHTHIPJOINt i set to HIP

and that really does't work.. Although thankfully at least the BVH works and opens: ) , the animation looks weird.. like if it's a BVH of a character walking. his legs move fine, perfectly, but the hip stays unmoveable

is this just not possible to convert these kind of bvhs?