Help needed with ApplyUpdate

[delphiman]

I am using Delphi 6 Enterprise and Interbase 6 and have a working model of a 3-Tier system.

Can anyone please tell me why the following procedure works (as confirmed from a TDBEdit
control on a TForm on the ThinClient) but when I visit tblTRNSFR the UpDate has - in fact -
NOT taken place?

procedure TParentDM.IBFatherDataSetAfterScroll(DataSet: TDataSet);
begin
with ParentDM.IBFatherDataSet do
begin
ParentDM.IBdsTrnsfr.Active := True;
if ParentDM.IBdsTrnsfr.state in dsEditModes then
else
ParentDM.IBdsTrnsfr.edit;
ParentDM.IBdsTrnsfrP_NO.value := ParentDM.IBFatherDataSetP_NO.value;
ParentDM.IBdsTrnsfr.ApplyUpdates;

Thanks in advance.

Terry