Redmine

Developing Redmine 2.1.0 in my network with Sub-URI - "example.com/redmine".
Entire site is working flawlessly until i got next error while tried to edit/delete issue category under project.
After i'm trying to delete/edit category browser shows "404 not found",
while trying to open URL "http://192.168.0.110/issue_categories/1/edit" and not something like
"http://192.168.0.110/ redmine /issue_categories/1/edit"

Not Found
The requested URL /issue_categories/1/edit was not found on this server.

httpd/error_log

[Wed Sep 19 21:07:11 2012] [error] [client 192.168.0.198] File does not exist: /var/www/html/issue_categories, referer: http://192.168.0.110/redmine/projects/daily/settings
[Wed Sep 19 21:07:11 2012] [error] [client 192.168.0.198] File does not exist: /var/www/html/favicon.ico

redmine/production_log showing nothing.

Didn't counter any other problem by that time.