Update Datums after creating constraints

Hello,
i am creating a plant which contains of components.
Constraints are used to connection the separate components with each other.
I used a DatumAxis to identify, when i have to reverse the constraints.

So my problem is, after connect to components with each other, the datumaxis didn't not update his data. He still has the old values in.
Only after the action-call he will update his new Values.

The follow methods i have already try, without success:
Update.DoAssemblyConstraintsUpdate
Update.DoUpdate
Update.MakeUpToDate

Has anyone an idea?