After the selection,
- store that value in a hidden (if preferred) form textbox and link the subform on that
- or store the name of the subform in it that should be shown if you already have a parent/child relationship established.
On the appropriate event (Activate?) code so that whichever of the two methods is used will show the correct subform and hide the other.
Not sure which you should do (or both) without a better understanding of how the form/subforms are linked.
P.S. object names should never start with a number, or contain special characters (save the underscore) or contain spaces.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.