Here is the Trace of my error:

Traceback (innermost last):
 File /home/weblog/Zope-2.3.3-linux2-x86/lib/python/ZPublisher/Publish.py, line 223, in publish_module
 File /home/weblog/Zope-2.3.3-linux2-x86/lib/python/ZPublisher/Publish.py, line 187, in publish
 File /home/weblog/Zope-2.3.3-linux2-x86/lib/python/Zope/__init__.py, line 221, in zpublisher_exception_hook
   (Object: Traversable)
 File /home/weblog/Zope-2.3.3-linux2-x86/lib/python/ZPublisher/Publish.py, line 171, in publish
 File /home/weblog/Zope-2.3.3-linux2-x86/lib/python/ZPublisher/mapply.py, line 160, in mapply
   (Object: testmethod)
 File /home/weblog/Zope-2.3.3-linux2-x86/lib/python/ZPublisher/Publish.py, line 112, in call_object
   (Object: testmethod)
 File /home/weblog/Zope-2.3.3-linux2-x86/lib/python/OFS/DTMLMethod.py, line 189, in __call__
   (Object: testmethod)
 File /home/weblog/Zope-2.3.3-linux2-x86/lib/python/DocumentTemplate/DT_String.py, line 540, in __call__
   (Object: testmethod)
 File /home/weblog/Zope-2.3.3-linux2-x86/lib/python/DocumentTemplate/DT_Util.py, line 339, in eval
   (Object: manage_addProduct['ExtFile'].manage_addExtFile(id='id1', title='ddd', descr='aaaaa', file='D:\terminalclient.zip',
                     content_type='', permission_check=0,REQUEST=REQUEST))
   (Info: REQUEST)
 File <string>, line 0, in ?
 File /home/weblog/Zope-2.3.3-linux2-x86/lib/python/Products/ExtFile/ExtFile.py, line 101, in manage_addExtFile
   (Object: Traversable)
 File /home/weblog/Zope-2.3.3-linux2-x86/lib/python/Products/ExtFile/ExtFile.py, line 371, in manage_file_upload
   (Object: CatalogAware)
 File /home/weblog/Zope-2.3.3-linux2-x86/lib/python/Products/ExtFile/ExtFile.py, line 472, in _copy
   (Object: CatalogAware)
IOError: (see above)