i can't run wxPython

[mdk.R]

Hello all:
   i'am installed wxPython 2.5 and Python2.3.4..i try execute script
with wxPython but it show error:
Traceback (most recent call last):
  File "E:\py\test.py", line 7, in ?
    import wx
  File "E:\py\wx.py", line 10, in ?
    from wxPython.wx import *
  File "D:\Python23\Lib\site-package
    import _wx
  File "D:\Python23\Lib\site-package
    from _core import *
  File "D:\Python23\Lib\site-package
    import wx._core
ImportError: No module named _core

the test.py file content is :


#----------------------------------------------------------------------
# A very simple wxPython example.  Just a wxFrame, wxPanel,
# wxStaticText, wxButton, and a wxBoxSizer, but it shows the basic
# structure of any wxPython application.
#----------------------------------------------------------------------

import wx


class MyFrame(wx.Frame):
    """
    This is MyFrame.  It just shows a few controls on a wxPanel,
    and has a simple menu.
    """
    def __init__(self, parent, title):
        wx.Frame.__init__(self, parent, -1, title,
                          pos=(150, 150), size=(350, 200))

        # Create the menubar
        menuBar = wx.MenuBar()

        # and a menu 
        menu = wx.Menu()

        # add an item to the menu, using \tKeyName automatically
        # creates an accelerator, the third param is some help text
        # that will show up in the statusbar
        menu.Append(wx.ID_EXIT, "E&xit\tAlt-X", "Exit this simple
sample")

        # bind the menu event to an event handler
        self.Bind(wx.EVT_MENU, self.OnTimeToClose, id=wx.ID_EXIT)

        # and put the menu on the menubar
        menuBar.Append(menu, "&File")
        self.SetMenuBar(menuBar)

        self.CreateStatusBar()
        

        # Now create the Panel to put the other controls on.
        panel = wx.Panel(self)

        # and a few controls
        text = wx.StaticText(panel, -1, "Hello World!")
        text.SetFont(wx.Font(14, wx.SWISS, wx.NORMAL, wx.BOLD))
        text.SetSize(text.GetBestSize())
        btn = wx.Button(panel, -1, "Close")
        funbtn = wx.Button(panel, -1, "Just for fun...")

        # bind the button events to handlers
        self.Bind(wx.EVT_BUTTON, self.OnTimeToClose, btn)
        self.Bind(wx.EVT_BUTTON, self.OnFunButton, funbtn)

        # Use a sizer to layout the controls, stacked vertically and
with
        # a 10 pixel border around each
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(text, 0, wx.ALL, 10)
        sizer.Add(btn, 0, wx.ALL, 10)
        sizer.Add(funbtn, 0, wx.ALL, 10)
        panel.SetSizer(sizer)
        panel.Layout()


    def OnTimeToClose(self, evt):
        """Event handler for the button click."""
        print "See ya later!"
        self.Close()

    def OnFunButton(self, evt):
        """Event handler for the button click."""
        print "Having fun yet?"


class MyApp(wx.App):
    def OnInit(self):
        frame = MyFrame(None, "Simple wxPython App")
        frame.Show(True)
        self.SetTopWindow(frame)
        return True
        
app = MyApp(True)
app.MainLoop()

where is error?? help me.Thank very much!!!