Jogging YUMI IRB14000

I can jog the robot in Linear mode, but then I switch to AXIS 4-6 and it will not move Axis 6. What is the probem?  There is no alarm or error present.
When I switch back to Linear mode it will allow me to jog in any of the axis, 3, 4 or 6.

Can anyone help me understand what I am doing wrong?