One of my grids seems to loose contact with related cursors after I change its' recordsource on the fly.

This is the setup in the dataenvironment:

Cursor1 --> Cursor2 --> Cursor3

Initially, Cursor2 is the recordsource. Changing recordsource to Cursor1, seems to deactivate the relation from Cursor2 into Cursor3. But just in the grid, not in the Dataenvironment.

Does anyone have an idea on how I can make the grid pick up the relation again?