[pmwiki-users] Problems with a new wiki

[Fish, Lydia]

I have been using wikis in all my classes for the past five years.  This weekend I put up a wiki for my folklore class that will not work properly.  The wiki is at http://www.lydiafish.us/folklorewiki_spring2011.  I have carefully followed all the installation and setup procedures, but when I try to edit the page or navigate away from it I get at 404 error (page not found) message.  The wiki that I put up for my folkore and fantasy class at http://www.lydiafish.us/fantasywiki_spring2011 is working perfectly.

Can anyone figure out what I have done wrong?

Thank you very much!

Lydia Fish