Inverse Kinematics is unable to reach points

Hi All,

I have a simple crane on which I've defined all Connections, and I can Jog the mechanism without any issue.

But after creating the Inverse Kinematics and when trying to Jog it by pulling from the axis system linked to the TCP Port, all Points seem to be unreachable....

Can anyone please help to clarify what's wrong with this?

See attached Video and 3dxml Model.

 

Thanks a lot in advance and kind regards