请教各位大侠关于图像存储的问题

环境为DELPHI6＋SQL2000，表IMAGETEST有字段FIMAGE，类型为IMAGE.
插入图片：
procedure TForm1.Button2Click(Sender: TObject);
var
   graphic1:TJpegImage;
   MS:TMemoryStream;
   //file_name:string;
begin
   //file_name:=edpicname.Text;
   MS:=TMemoryStream.Create;
   graphic1:=TJpegImage.Create;
   Image1.Picture.LoadFromFile(opendialog1.filename);
   graphic1.LoadFromFile(opendialog1.filename);
   graphic1.SaveToStream(MS);
   MS.Position:=0;
   with  query1 do
   begin
      sql.Clear;
      sql.Add('insert into imagetest(fimage) values(:FIMAGE) ');
      //ParamByName('FIMAGE').LoadFromfile(opendialog1.filename,FtBlob);
      ParamByName('FIMAGE').LoadFromStream(MS,FtBlob);
      ExecSQL;   end;
   graphic1.free;
end;
读出代码：
procedure TForm1.Button3Click(Sender: TObject);
var
   MS:TMEmoryStream;
   JpegImage:TJpegImage;
   f: file of Byte;
begin
   JpegImage:= TJpegImage.Create;
   MS:=TMEmoryStream.Create;
   with Query1 do
   begin
      close;
      sql.Clear;
      sql.add('select  fimage from imagetest');
      open;
      while not EOF do
      begin
         next;
      end;
      try
      TBlobField(FieldByName('fimage')).SaveToFile('tmp.jpg');
      //if GetFileSize('tmp.jpg')>0 then  //文件长度为0装入会出错
      //begin
        AssignFile(f,'tmp.jpg');
        Reset(f);        if  filesize(f)>0 then showmessage('save success');
        closefile(f);
        JpegImage.LoadFromFile('tmp.jpg');
        Image2.Picture.LoadFromFile('tmp.jpg');
      //end;
    finally
      JpegImage.Free;
    end;
   end;
end;
可是经测试，大于32K的图片显示就不完整，怎么解决？？？