线程中show 窗口的问题

  while (ServerRun)

            {

                try

                {

                    using (HttpWebResponse response = HttpWeb.HttpWebResponseUtility.CreatePostHttpResponse(url, para2, cookie))

                    {

                        if (response != null && response.StatusCode == HttpStatusCode.OK)

                        {

                            string result = HttpWeb.HttpWebResponseUtility.GetData(response, Encoding.UTF8);

  AlertLib.AlertForm f = new AlertLib.AlertForm();

                                        f.Show(result , "提示", AlertLib.AlertForm.ShowWay.Fade, 300, 200, 200, 3000, 500);

                         

                        }                     

                    }

                }

                catch (System.Exception ex)

                {

                   

                }

                Thread.Sleep(10000);

                Application.DoEvents(); 

              

                //GC.Collect();

            }

现在碰到2个问题 
1. 窗口老是处于 未响应状态
2. show出来的窗口不能处于桌面的最顶端

请问怎么解决