权限拒绝错误时，我试图启动appengine php服务器

我试图启动GAE php本地服务器，我得到一个"[Error 5]权限被拒绝"错误(Acceso denegado)。我在两台不同的电脑上尝试了这个都用windows 7(一个是家庭版，一个是企业版)，总是出现同样的问题。

在这两种情况下，我是一个具有管理员权限的用户，我已经遵循了helloworld示例的说明，但没有运气。我关闭了IIS服务器，以避免与标准端口冲突。

下面是我的启动服务器命令行:

C:/Users/alalarcon/google_appengine/dev_appserver.py --php_executable_path="C:/Users/alalarcon/php-5.4.15" "C:/Users/alalarcon/helloworld/"

这是控制台的结果:

C:'Users'alalarcon'google_appengine>dev_appserver.py --php_executable_path="C:/Users/alalarcon/php-5.4.15" "C:/Users/alalarcon/helloworld/"
WARNING  2013-05-30 10:03:02,525 api_server.py:329] Could not initialize images API; you are likely missing the Python "PIL" module.
INFO     2013-05-30 10:03:02,539 api_server.py:153] Starting API server at: http://localhost:63819
INFO     2013-05-30 10:03:02,545 dispatcher.py:164] Starting server "default" running at: http://localhost:8080
Exception in thread Thread-5:
Traceback (most recent call last):
  File "C:'Users'alalarcon'Python27'lib'threading.py", line 810, in __bootstrap_inner
    self.run()
  File "C:'Users'alalarcon'Python27'lib'threading.py", line 763, in run
    self.__target(*self.__args, **self.__kwargs)
  File "C:'Users'alalarcon'google_appengine'google'appengine'tools'devappserver2'server.py", line 1232, in _loop_adjusting_instances
    self._adjust_instances()
  File "C:'Users'alalarcon'google_appengine'google'appengine'tools'devappserver2'server.py", line 1209, in _adjust_instances
    self._add_instance(permit_warmup=True)
  File "C:'Users'alalarcon'google_appengine'google'appengine'tools'devappserver2'server.py", line 1087, in _add_instance
    expect_ready_request=perform_warmup)
  File "C:'Users'alalarcon'google_appengine'google'appengine'tools'devappserver2'php_runtime.py", line 195, in new_instance
    self._check_environment(php_executable_path)
  File "C:'Users'alalarcon'google_appengine'google'appengine'tools'devappserver2'php_runtime.py", line 138, in _check_environment
    env={})
  File "C:'Users'alalarcon'google_appengine'google'appengine'tools'devappserver2'safe_subprocess.py", line 61, in start_process
    stdin=subprocess.PIPE)
  File "C:'Users'alalarcon'Python27'lib'subprocess.py", line 711, in __init__
    errread, errwrite)
  File "C:'Users'alalarcon'Python27'lib'subprocess.py", line 948, in _execute_child
    startupinfo)
WindowsError: [Error 5] Acceso denegado
INFO     2013-05-30 10:03:02,551 admin_server.py:117] Starting admin server at: http://localhost:8000

任何帮助都很感激，谢谢。