Query results won't display in DBGrid using variable parameters

Hi Experts;

Using a Delphi 7 ADOQuery component my application displays data results using hard-coded values in the Query but apparently will not recognize the same values as variables converted to integers from two TEdit controls

Code snippet - OnClick Event...
Query1.Parameters.ParamByName('RegID').Value := StrToInt(Edit1.Text);
Query1.Parameters.ParamByName('BatNum').Value := StrToInt(Edit2.Text);
Query1.Open;

Code snippet from Query:
WHERE TenderEntry.BatchNumber = :BatNum AND Batch.RegisterID = :RegID
With the Parameters 'BatNum' and 'RegID' in Query1 no results are displayed in the Delphi DBGrid.

Using hard-coded values without Parameters the results display without issue.

Code snippet from Query:
WHERE TenderEntry.BatchNumber = 1 AND Batch.RegisterID = 1

I need help in getting the Query to recognize the variable parameters from the TEdit boxes.

Any thoughts or a solution will be greatly appreciated.

Thank you,
Visionetv