Subform Does not read recordset

Hello Experts,

I have the following query qryDiscrepancies

SELECT tblReservations.*
FROM tblReservations
WHERE (((tblReservations.fldTripSubType)=[Forms]![frmDiscrepDetails]![txtTripID]));

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Here frmDiscrepDetails is a parent form and with in it I have a subform, whose record source = qryDiscrepancies

However, when I load the parent form, the subform is empty, but while the parent form is still loaded if I run qryDiscrepancies I get the needed records in the query view, but never in the subform.

What am I doing wrong?