wxPython looses function "wxPython.wx.miscc"

[Anand]

I am calling a python script from LabVIEW. This is achieved by making
a dll call to python22.dll. It works perfectly well for most of my
code. I now want to throwup dialog boxes from python. It works just
fine if i run the code once.

but when i call the same piece of code the second time,
wxPython.wx.miscc does not exist for some reason. I dont know how this
gets deleted. I guess this happens during some kind of clean up. The
code that i use for showing a dialog box is as follows:

from wxPython.wx import *
            app = wxPySimpleApp()
            dlg = wxMessageDialog(None, Text,
                          'A Message Box', wxOK | wxICON_INFORMATION)
                          #wxYES_NO | wxNO_DEFAULT | wxCANCEL |
wxICON_INFORMATION)
            dlg.ShowModal()
            dlg.Destroy()
            app.MainLoop()

when i call it the second time i get the following error:

line 1139, in showDialog
    from wxPython.wx import *
  File "C:\PROGRA~1\Python22\lib\site-packages\wxPython\wx.py", line
4, in ?
    from misc import *
  File "C:\PROGRA~1\Python22\Lib\site-packages\wxPython\misc.py", line
2, in ?
    import miscc
ImportError: No module named miscc

     is there a solution? What is really happening? i am new to
WxPython.