静态化乱码--大家帮忙啊

以前本来好好的，结果换了台服务器就出现乱码了，可能是什么原因？各位大侠帮忙看看，下面是部分代码
        StreamWriter sw = new StreamWriter(a, false, Encoding.Default);
        WebRequest HttpWebRequest = WebRequest.Create("http://www.****.cc/news/" + url);//url之前已经定义
        WebResponse HttpWebResponse = HttpWebRequest.GetResponse();
        sr = new StreamReader(HttpWebResponse.GetResponseStream(), Encoding.Default);
        string strHtml = sr.ReadToEnd();
        sw = File.CreateText(Server.MapPath("~/news/" + a));
        sw.WriteLine(strHtml);
        sw.Close();
        Response.WriteFile(Server.MapPath("~/news/" + a));

[[it] 本帖最后由 yunj1105 于 2008-12-2 09:20 编辑 [/it]]