[Zope] debugging ZServer FTP sessions.

I'm attempting to use ZServer's ftp daemon to upload a number of images into my database, however no matter what I try I always get back ftp> put sidebar.gif local: sidebar.gif remote: sidebar.gif 200 PORT command successful. 150 Opening Binary connection for sidebar.gif 550 Error creating file. 189 bytes sent in 0.00139 secs (1.3e+02 Kbytes/sec) ftp> I've tried this with an image that doesn't exist, as well as for one that already exists. Is it just a matter of "it doesn't work for images" or what? Also, where does ZServer send errors from ftp sessions? It looks to me like it's just silently eating them. :( Anthony