Can anyone help with object replacement tool and setting up sling loads

HI all

I want to setup some saved flights using object placement tool and liftable objects and do some sling load flights. I have selected and added the liftable item from scenery list placed that in my scenery and saved as mission which creates a xml file. Saved the flight, place the file object name into the .FLT file along with the hoist and sling commands and placed the xml file in the documents folder .

My helicopter has the hoist and sling text in the aircraft.cfg file.

I start my saved flight and my object is there and the on screen info says hook enabled but the load wont attach to the cable. I have set the cable length to 60 hovered over the object but the object wont attach.

I have checked the xml file but have I missed something that commands the object to attach to the hook when I hover over it.

Hoping someone can help me out

Regards

Rhys