Spline Handles
 

I'm trying to create a toung rig using a spline handle. The problem I am having is the curve will not attach its self to the joint chain. I can open a new scene(nothing in it) and using the same settings the rig will work fine. What could be causing the rig not to work in my project file. Steps I use: Create joint chain(default settings),next create CV curve(default settings) Then I add the IK spline handle (I turn off Auto Create Curve and Auto Parent Curve) I click on the root joint first then the last joint then the curve. In a new scene it works fine in my project scene it does not. Can anyone help. PLEASE