Hi - Can someone with a little more experience than me help me with an infuriating problem?

I have a prop (ok its a naughty one - V4s 'bits') they snap to the correct location when I load them, but then if I pose V4 at all, they remain where they are. I suspected a parenting issue, but haven't had any success - what am I doing wrong?

I have Poser Pro 2014 64 bit.

 

Thanks in advance, you helpful people!