Jet ways and jetway extension

Hello everyone.

I make a totally fictional airport for our community.
The biggest is done, I’m in the detail.

I have a problem in the realization of jetways (I am talking here about the basic jetway version in the basic package of the simulator).

As indicated in a lot of tutorial, I did my parking and I added the element of scenery Jetway. This shows me the end of the jetway. My problem comes from the extension, in the tutorials it is usually indicated to add the Jetway mini link or another and that the two elements will connect as soon as we approach them in the SDK. At home this is not the case at all.

The two parts are well dissociated and when the end moves, the extension it remains fixed, like a fixed building. Is this normal? Am I forgetting something?