Rigid Binded Works As Softbinded

I added joints to some of chain units.
I rigid binded .

but when I bend the IK Handle;
my rigid binded nurbs chain beads are simulates as soft binded objects...

why ?

and scene file is
http://rapidshare.de/files/6861582/p1.zip.html

(click FREE button)
(wait for 30-40 second. then link will appear bottom of page)

400) {this.resized=true; this.width=400; this.alt='Click here to open new window';}" onmouseover="if(this.resized) this.style.cursor='hand';" onclick="if(this.resized) {window.open('http://img475.imageshack.us/img475/2600/frame68lf.jpg');}" />

400) {this.resized=true; this.width=400; this.alt='Click here to open new window';}" onmouseover="if(this.resized) this.style.cursor='hand';" onclick="if(this.resized) {window.open('http://img375.imageshack.us/img375/606/prigidbindgoessoftbind3ql.gif');}" />

1st of all and by the all means - WHY DO YOU NEED SKINNING? btw skinning itself has been poorly done.
consider PARENTING chain segments instead.

shouldn't I attach chain beads to joints ?
instead of attaching via rigid bind;should I use to parenting the chain beads one by one ? to each its joint ?

you mean this ?

exactly

yes I see DA point.

hm... normally joints are using to have more far distance.exception is mine scene
because joints are very neararound the other one.so it deforms main objects...
hmm...

thanks muchos gracias