不好意思，我已经搞定，原来是加错了地方（脸红了，成了红豆了）！

请将WINNT\HELP\IISHELP\COMMON\500-100.asp中做如下改动：
<%
  Dim bakCodepage
  bakCodepage = Session.Codepage
  Session.Codepage = 936
  Response.Write Server.HTMLEncode(objASPError.Category)
  If objASPError.ASPCode > "" Then Response.Write Server.HTMLEncode(", " & objASPError.ASPCode)
  Response.Write Server.HTMLEncode(" (0x" & Hex(objASPError.Number) & ")" ) & "<br>"
  If objASPError.ASPDescription > "" Then Response.Write Server.HTMLEncode(objASPError.ASPDescription) & "<br>"
  blnErrorWritten = False
  
  Response.Write "<B>"
  
  If objASPError.Description > "" Then Response.Write Server.HTMLEncode(objASPError.Description) & "<br>"
  '' Only show the Source if it is available and the request is from the same machine as IIS