[Zope] FTP server problem

[Gareth Allen]

Hello,

I'm experiencing a strange problem. I've enabled FTP access to my Zope 
instance, but when I try and login it throws an exception:

2009-03-23T11:14:42 INFO ZServer Successful login.
------
2009-03-23T11:15:07 ERROR ZServer uncaptured python exception, closing 
channel <ZServer.FTPServer.zope_ftp_channel connected 196.*.*.*:48336 at 
0x2a9c0ecd40> (exceptions.AttributeError:'NoneType' object has no 
attribute '_fileno' 
[/home/zope/Python-2.4.4/lib/python2.4/asyncore.py|read|69] 
[/home/zope/Python-2.4.4/lib/python2.4/asyncore.py|handle_read_event|391] 
[/home/zope/Python-2.4.4/lib/python2.4/asynchat.py|handle_read|89] 
[/home/zope/Python-2.4.4/lib/python2.4/asyncore.py|recv|347] 
[/home/zope/Python-2.4.4/lib/python2.4/asynchat.py|handle_close|156] 
[/home/zope/instances/www.emss.co.za/parts/zope2/lib/python/ZServer/medusa/ftp_server.py|close|181] 
[/home/zope/instances/www.emss.co.za/parts/zope2/lib/python/ZServer/medusa/ftp_server.py|close|906] 
[/home/zope/Python-2.4.4/lib/python2.4/asyncore.py|close|360] 
[/home/zope/Python-2.4.4/lib/python2.4/asyncore.py|del_channel|248] 
[/home/zope/Python-2.4.4/lib/python2.4/asyncore.py|__getattr__|366])

I thought it may be a Plone permissions problem as I was using a Plone 
user account, but even as the Zope admin user it throws the above error. 
Passive mode throws the exception. Active mode doesn't throw an error, 
but doesn't show a directory listing either.

Zope version: Zope 2.10.6-final
OS: Debian Sarge
FTP clients used: FileZilla, standard Linux FTP client and Firefox (as a 
last resort).

Regards,
Gareth Allen