I can't view list of files in subfolders of my site

[loststar300095]

From near Oct 14 2011 i loosed ability to viewing list of files in subfolders of my site in browsers when i typed link-address with subfolder (for example, http://loststar3000.elementfx.com/jpeg/).
1. If nothing to do in C-panel-Advansed-index manager i get "404 Error The file or directory you have requested was not found on the server.Common reasons for this error:
Incorrectly spelt file or directory.
The file or directory was removed."
2. If i changing in the Index Manager the way a directory will be viewed on the web to "Fancy Indexing" - no error, but in browsers wondow nothing...

What is wrong?

P.S. Sorry for my English

[loststar300095]

answer me, please