Documents in Zoho Projects don't work at all!

I can't get any odcuments working - when i go to my project's documents page, and I click "New Document", and fill out the form, when i press "Create new document" it doesn't do anything - the document creation dialog disappears, but no document is listed. Also, when i upload a document, it works fine, but if i click the button to edit it in Zoho Writer, it says "Opening Zoho Writer File" very quickly and then nothing happens! What's wrong?