用WebClient上传文件时，提示远程服务器返回错误：（403）已禁止，这个是什么原因？
private void button4_Click(object sender, EventArgs e)
{
String sPath = System.Diagnostics.Process.GetCurrentProcess().MainModule.FileName;
sPath = sPath.Substring(0, sPath.LastIndexOf('\\') + 1);
Image newImage = Image.FromFile(sPath + "PMimages\\image_HE.png");
button5.Image = newImage;

//Stream myStream = null;
OpenFileDialog dlg = new OpenFileDialog();
string COMPRESSEDPACKAGE = m_ReadResDLL.ReadString(IDInResDLL.IDS_COMMON_COMPRESSEDPACKAGE);
dlg.Filter = "RAR(" + COMPRESSEDPACKAGE + ") files (*.rar)|*.rar|All files (*.*)|*.*";
//dlg.Filter = "RAR(压缩包) files (*.rar)|*.rar|All files (*.*)|*.*"; //中文比较
dlg.FilterIndex = 1;
dlg.RestoreDirectory = true;

if (dlg.ShowDialog() == DialogResult.OK)
{
try
{
// Insert code to read the stream here.
string strFile = dlg.FileName;
string strFilename = strFile.Substring(strFile.LastIndexOf("\\") + 1);
strFilename = strFilename.Substring(0, strFilename.IndexOf("."));

/************************************************************************/
/* xl修改于2010-5-14 */
//先将文件上传至服务器
WebClient myWebClient = new WebClient();
// 每次从ini中读取多少字节
System.Text.StringBuilder temp = new System.Text.StringBuilder(255);
// section=配置节，key=键名，temp=上面，path=路径
sPath += "Profile.ini";
GetPrivateProfileString("Trans", "ServerIP", "127.0.0.1", temp, 255, sPath);
string remoteUri = "http://" + temp.ToString() + "/load/";

string myStringWebResource = null;
myStringWebResource = remoteUri + strFilename + ".rar";
（每次到这就跳到catch了） myWebClient.UploadFile(myStringWebResource, "PUT", dlg.FileName);


/************************************************************************/
int ret = s.ImportPaper(strFilename);

//s.DelServerFile(sourpath);
if (ret == 0 || ret == -1)
{
string no = m_ReadResDLL.ReadString(IDInResDLL.IDS_COMMON_IMPORTFAILED);//完成
MessageBox.Show(no);
//MessageBox.Show("导入失败");
return;
}
string yes = m_ReadResDLL.ReadString(IDInResDLL.IDS_STANDARDDLL_IMPORTSUCCESS);//完成
MessageBox.Show(yes);
// MessageBox.Show("导入成功");
string filename = strFile.Substring(strFile.LastIndexOf("\\") + 1);
s.DelServerFile(filename);
filename = filename.Substring(0, filename.IndexOf("."));
s.DelServerFile(filename);

// 刷新列表
//数据加载显示试卷表的数据
DataSet dss = s.SelectPaperAll();
DataTable dtt;

dtt = dss.Tables[0];
dataGridView1.DataSource = dtt;
}
catch (Exception ex)
{
MessageBox.Show("Error: Could not read file from disk. Original error: " + ex.Message);
}
}
}
[解决办法]
load/文件夹没有设置匿名帐户可写入权限