FSO读写远程文件失败

IIS设定非匿名访问。如果把文件路径改在本地，如\\127.0.0.1\share\myfile.txt，程序运行没有问题。但改到远程就是不行，远程的共享文件夹都是Everyone可以读写访问的啊。请高手指点还有什么地方不对！

   <%
   Set ScriptObject = Server.CreateObject("Scripting.FileSystemObject")
   Set MyFile =   ScriptObject.OpenTextFile("\\192.168.0.10\share\myfile.txt", 8,true)
   MyFile.WriteLine "*** Write file test ***"
   Myfile.writeline "     file was written to at: " & Now
   Myfile.writeline " "
   MyFile.Close
   %>