Py2exe problem with wxPython 2.5.3

[Lad]

I use wxPython 2.5.3 with PythonWin 2.3.4. I have a script that can be
run
from Python without any problems. But when I try to run the compiled
script( with Py2exe) I get

Traceback (most recent call last):
File "start.py", line 1, in ?
File "rgs.pyc", line 17, in ?
File "wxPython\__init__.pyc", line 10, in ?
File "wxPython\_wx.pyc", line 3, in ?
File "wxPython\_core.pyc", line 15, in ?
ImportError: No module named _core

(Although Py2Exe did not report that the modul is missing after
compilation.)

Where can be a problem?
Thanks for help
Lad