Hi Sam,
When using a date field in a browser dialog, usually you need to setup a range of the same file to search From and To. Following that scenario in your BD search fields, you need to create the same field but with Unique Keys as follow:
Search From Field:
Unique Key: MyDateField_From
In the General Tab, Search Style: Greater Than or Equal To
In the Date Tab, Time Action: Set Time To Start of Day (Midnight)
Search To Field:
Unique Key: MyDateField_To
In the General Tab, Search Style: Less Than or Equeal To
In the Date Tab, Time Action: Set Time To End of Day (23:59:59)
With above setting you can search for a particular date and will show the records correctly.
About the BD using a datetimepicker, I don't know why they have not implemented a datebox yet, but could be because the datetimepicker support both date and time and DateBox not.
Edhy Rijo