在apache中无法访问dir中的图像

I have created two directories where i am storing profile pic. When i access these images by typing there url , it automatically converted to index.php I am typing

http://192.168.1.147/Dropbox/control_panel/uploads/users_big/196.jpg

here 192.168.1.147 is my local network address this address is automatically converted to

http://192.168.1.147/Dropbox/control_panel/uploads/users_big/index.php

i also have an image in uploads folder

http://192.168.1.147/Dropbox/control_panel/uploads/196.jpg

this image can be access easily.

This is my .htaccess

<IfModule mod_rewrite.c>
RewriteEngine on
RewriteRule ^notifications/?$ notifications.php
RewriteRule ^trash/?$ trash.php
RewriteRule ^Library/?$ library.php
RewriteRule ^docs/([\s\S\+]+)$ docs/checkfile.php
</IfModule>

Additional Details After converting to index.php the page says that "This webpage has a redirect loop" and also there is no index.php file exists