[Zope] cannot upload files/create new objects

relative newbie problem: all of the sudden today, after uploading hundreds and hundreds of small/med/large documents onto a website, my zope won't let me create any new objects or upload any new documents. i've tried all first-tier solutions, including re-installing zope, restarting computer & zope, making sure i have disk space, etc. but still, when i try something as simple as creating a new folder, my browser sits and "works" and "works" and never times out. help? adam