[Zope] Accesing python module

[Leticia Larrosa]

Hi:
 I installed the "PyXml" package, and appear in the 
"c:\Python24\Lib\site-packages" folder and i want to import a module of that 
library from an external method:
"import xml.dom.ext"
But i can't import from an external method any of the modules that are in 
the "Lib\site-packages" folder of my python instalation.
Why can't import them?
By default an external method have acces to modules that are in 
"Lib\site-packages" of a Python installation?
I use Zope 2.7.6 
for windows and Python2.4 ("c:\Python24\Lib\site-packages" !)
The error that i get is:
"
Site Error
An error was encountered while publishing this resource. 
Error Type: ImportError
Error Value: No module named ext
"
and the trace:
"
Traceback (innermost last):
  Module ZPublisher.Publish, line 101, in publish
  Module ZPublisher.mapply, line 88, in mapply
  Module ZPublisher.Publish, line 39, in call_object
  Module Shared.DC.Scripts.Bindings, line 306, in __call__
  Module Shared.DC.Scripts.Bindings, line 343, in _bindAndExec
  Module Products.PythonScripts.PythonScript, line 323, in _exec
  Module None, line 31, in callServiceResume
   - <PythonScript at 
/approach/SiccApproach/serviceResume/callServiceResume>
   - Line 31
  Module Products.ExternalMethod.ExternalMethod, line 216, in __call__
  Module Products.ExternalMethod.ExternalMethod, line 157, in 
reloadIfChanged
  Module Products.ExternalMethod.ExternalMethod, line 141, in getFunction
  Module App.Extensions, line 148, in getObject
   - __traceback_info__: ('C:\\Program 
Files\\Zope-2.7.6-final\\Extensions\\proxyModule.py', 'proxyModule')
  Module C:\Program Files\Zope-2.7.6-final\Extensions\proxyModule.py, line 
18, in ?
ImportError: No module named ext
"
Thanks in advance
Leticia
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