[Zope] Zope 2.2.0b2 FTP server -- Cannot list directory?

I'm having a problem with the Zope FTP server in 2.2.0b2. If I try to get a directory listing, it gives an error saying it can't list the directory. If I try to change directories (even 'cd /'), it tells me it can't find the directory. However, if I know the exact name of the file I want to transfer, it will let me do it. Any ideas? - T.J.