[Zope] FTP Woes and no answer

I have FTP'd into Zope before. No problems but all of a sudden it seems like neither I nor the people I am working with can FTP in with either a manager or superuser account. I have tried to change the port and all sorts of other things but on a few different installations with different clients from different machines and OSes it just does list any of the files in the directory. Has anyone experienced this? Know a work around? J