The requested URL /mailbox.php3 was not found

[Raymond]

Hello Imp:

This is my second attempt at installing IMP. I tryed about 5 months ago. I
gave up back then. I started the Linux Public Broadcasting network about a
month. The network project is taking off very well but doesn't leave me with
much time. The Community center where we meet on Monday nights has a computer
training class during the day. It is all non-profit community based stuff. The
instructors need the webmail to keep in touch with their students. That is why
I have to set up the server there with IMP. I would like to finish the
installation within an 8 hour session if possible. Does anybody know what I
might do to resolve the following message:
Not Found
The requested URL /mailbox.php3 was not found on this server.
Apache/1.3.14 Server at server.fsstech.org Port 80

Raymond