Arrggghhh n00b of me, its solved now. Sorry for bothering you Theo.
Here it is the working code :
procedure TForm1.Button1Click(Sender: TObject);
var
ser: TBlockSerial;
begin
ser:=TBlockSerial.Create;
try
ser.Connect('COM19');
ser.Config(9600,8,'N',0,false,false);
Memo1.Lines.Text:=ser.ATCommand(Edit1.Text);
finally
ser.free;
end;
end;