How Do I Re-execute The Query A Subform Is Based On?

Because my tables were already large I split them up by environment to speed up data maintenence and retrieval. Thus I have table names which contain the environment as part of the table name (ex: tbl_TEST_MyTable, tbl_PROD_MyTable). Once the user sets the environment they want to use (by clicking on an option button) I update the form's recordsource to the appropriate table. My form has 5 subforms within it.

Even with the split loading the form was taking a long time because some of the queries the subforms are based on are joining tables so that they can be linked (parent/child) to the form. I created indexes to speed up the data access which helped a little but it was still running too slow. So, I attempted to change the subform's queries to only join the necessary data by re-creating the queries each time the user changes the form's current record.

For example, what I had originally was taking too long:

SELECT DISTINCT tb.*, pt.CollId, pt.ProgName, pt.QueryNo
FROM tbl_TEST_SysTables AS tb INNER JOIN tbl_TEST_Plan_Table AS pt
ON tb.Name = pt.TName
ORDER BY tb.Name;

and the parent/child link fields are CollId, ProgName, and QueryNo.

This is the change I made:

SELECT DISTINCT tb.*, pt.CollId, pt.ProgName, pt.QueryNo
FROM tbl_TEST_SysTables AS tb INNER JOIN tbl_TEST_Plan_Table AS pt
ON tb.Name = pt.TName
WHERE pt.CollId = 'BATCH_COLLECTION'
AND pt.ProgName = 'PROGRAM1
AND pt.QueryNo = 123
ORDER BY tb.Name;

where the pt fields are changed dynamically each time the user navigates to the next record in the form. This resulted in much faster access time; however I discovered that the form was always displaying the query that existed before the form was opened. I have not been able to figure out how to get the subforms to display the latest created query.

While debugging I discovered that the form's OnCurrent event was being executed 3 times before the form is opened. I don't know what I'm doing that's causing this.

I also discovered that the subform events are executed before the form's events, so I think that's why the latest query isn't being used. I attempted to requery the subform in the form's OnCurrent and OnOpen event, but to no avail.