Problem excluding Element from IK chain

I’m trying to exclude some extra bones at the top of a simple IK rig I’m working with and can’t seem to select individual bones using Ctrl+Click (windows) with the IK tool.

When I select a bone with Ctrl+Click the IK tool just switches to the Transform tool.

Anyone have any idea what’s causing this?

HI there, Yeah I have similar problem. My character have many more bones that it need. Same body now now to set up it!!???
Neutronrobot and me will give u big big thanks