PoseChannel Error

Hi

I’m trying to animate the “Jim” rig by William Reynish (from the “Character Animation using Blender” DVD) using Blender 2.49 beta. When I activate the automatic keyframe tool and then move or rotate any part of the rig I get a popup error message “PoseChannel has invalid group”. I have tried re-appending and linking the rig, reinstalling Blender and using an older Blender version but the error still pops up. Sometimes, once the error message dissapears, changes I’ve made to the rig don’t appear anymore.

I need help.