Enveloping problem!

[mechis]

Hey everyone,

I'm rigging up a model and have run into a problem with the enveloping. When I set the envelope, everything looks fine... but if I close the file and re-open it, the feet show up all twisted. Below is a picture of what I'm talking about-- the primitives you see at the feet are what I'm enveloping to... the real model's feet are twisted below.

If you have any idea what I'm doing wrong, I'd love to hear it.
xsi v5.11

Thanks,
~Mechis

http://farm4.static.flickr.com/3192/2426947200_d8d29e6a90.jpg
http://www.flickr.com/photos/7718792@N02/2426947200/

[mechis]

I was messing with the scene and found out that if I rotated my skin bones, I could untangle the twisted model. However... then my skin bone was in the wrong place! So, I muted the envelope, re-positioned the skin bone, un-muted the envelope and everything seems to be ok now.

I'd still like to know what people think could have gone wrong though... I've never had this happen before and would like to avoid it in the future if possible!!!!!!!!

Thanks,
~Mechis