Either add a Yes/No field to the table, so you can bound the Checkbox to it.
Or change the subform to a list box with multi select.
If you add the Yes/No field to the table, run an update query every time you
open the form to update the field to false, so the records will apear as not
selected.
UPDATE TableName SET TableName.YesNoFieldName = False
thanks for all who responded to my question that fast
[quoted text clipped - 17 lines]