When I installed Silva-0.9.3 and restart Zope, I found ImportError like this - cannot import name ExpatError -

[jang, seungwook]

[root at orange Zope-2.6.2-linux2-x86]# ./start
------
2004-01-14T09:12:19 INFO(0) zdaemon Started subprocess: pid 14941
------
2004-01-14T09:12:38 ERROR(200) Zope Could not import
Products.SilvaDocument
Traceback (innermost last):
  File /usr/local/zope/Zope-2.6.2-linux2-x86/lib/python/OFS/Application.py,
line 522, in impor
t_product
  File /usr/local/zope/Zope-2.6.2-linux2-x86/lib/python/Products/SilvaDocument/__init__.py,
li
ne 7, in ?
  File /usr/local/zope/Zope-2.6.2-linux2-x86/lib/python/Products/SilvaDocument/EditorSupportNe
sted.py, line 10, in ?
ImportError: cannot import name ExpatError
------
2004-01-14T09:12:38 PANIC(300) z2 Startup exception
Traceback (innermost last):
  File /usr/local/zope/Zope-2.6.2-linux2-x86/z2.py, line 585, in ?
  File /usr/local/zope/Zope-2.6.2-linux2-x86/lib/python/Zope/__init__.py,
line 46, in startup
    (Object: startup)
  File /usr/local/zope/Zope-2.6.2-linux2-x86/lib/python/Zope/App/startup.py,
line 45, in start
up
  File /usr/local/zope/Zope-2.6.2-linux2-x86/lib/python/OFS/Application.py,
line 500, in impor
t_products
  File /usr/local/zope/Zope-2.6.2-linux2-x86/lib/python/OFS/Application.py,
line 522, in impor
t_product
  File /usr/local/zope/Zope-2.6.2-linux2-x86/lib/python/Products/SilvaDocument/__init__.py,
li
ne 7, in ?
  File /usr/local/zope/Zope-2.6.2-linux2-x86/lib/python/Products/SilvaDocument/EditorSupportNe
sted.py, line 10, in ?
ImportError: cannot import name ExpatError


Please Help Me ~ 

S.W. Jang