webpage PHP issue?

We are trying to post a new page link to this page
http://sociology.berkeley.edu/index.php?page=forums

the first link in the list is the new one,(27 Oct 2007)and will soon
point to it's own page.

_______________________________________________________________
Summary:
No new code was written. Only path/file name changes.
All link lines were copy/paste from lines that work (original 3 links)
No new html/php file was made just a copy and rename of a working one.
____________________________________________________________________

To start we used a page from a previous link
http://sociology.berkeley.edu/index.php?page=forum_kelsey

We copied the file forum_kelsey.php and renamed it to forum_kelse.php
Kept it in the same folder so no path changes, just a different file name.

If you go to the link page you can see where the link should point to
when you hover over the link. forum_kelse, but it gives invalid page
error if clicked.
If you click the 3rd link down "Teaching as Public Sociology" it will
take you to the original file forum_kelsey
We have altered the original link(forum_kelsey) to point to renamed file
and get the same error.

They are both the same file with only a single letter difference in the
file name.

Why would one link work and the other not?
Something to do with PHP?(which i don't know that well)

Thanks for any time on this,

-- 
Aaron DuBois
Sociology Tech
489 Barrows Hall
Mon-Fri 8:30am-12:30pm
510-643-9389
Department Web Master
Department IST Security Officer
Departmental Equipment Custodian
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