Leverage Browser Caching not working problem

Hello

I am using W3 total cache but i have a problem with caching and pagespeed. google is saying i should use Browser Caching not working problem and some examples of things not cached i get from google is

http://site.se/images/rss.png (expiration date has not been set)
http://site.se/…/themes/bk_bgtheme_jan13/images/back.jpg (expiration date has not been set)

so what is the problem ?

.HTTACCESS

</IfModule>
<IfModule mod_expires.c>
    ExpiresActive On
    ExpiresByType text/css A31536000
    ExpiresByType text/x-component A31536000
    ExpiresByType application/x-javascript A31536000
    ExpiresByType application/javascript A31536000
    ExpiresByType text/javascript A31536000
    ExpiresByType text/x-js A31536000
    ExpiresByType text/html A3600
    ExpiresByType text/richtext A3600
    ExpiresByType image/svg+xml A3600
    ExpiresByType text/plain A3600
    ExpiresByType text/xsd A3600
    ExpiresByType text/xsl A3600
    ExpiresByType text/xml A3600
    ExpiresByType video/asf A31536000
    ExpiresByType video/avi A31536000
    ExpiresByType image/bmp A31536000
    ExpiresByType application/java A31536000
    ExpiresByType video/divx A31536000
    ExpiresByType application/msword A31536000
    ExpiresByType application/vnd.ms-fontobject A31536000
    ExpiresByType application/x-msdownload A31536000
    ExpiresByType image/gif A31536000
    ExpiresByType application/x-gzip A31536000
    ExpiresByType image/x-icon A31536000
    ExpiresByType image/jpeg A31536000
    ExpiresByType application/json A31536000
    ExpiresByType application/vnd.ms-access A31536000
    ExpiresByType audio/midi A31536000
    ExpiresByType video/quicktime A31536000
    ExpiresByType audio/mpeg A31536000
    ExpiresByType video/mp4 A31536000
    ExpiresByType video/mpeg A31536000
    ExpiresByType application/vnd.ms-project A31536000
    ExpiresByType application/x-font-otf A31536000
    ExpiresByType application/vnd.ms-opentype A31536000
    ExpiresByType application/vnd.oasis.opendocument.database A31536000
    ExpiresByType application/vnd.oasis.opendocument.chart A31536000
    ExpiresByType application/vnd.oasis.opendocument.formula A31536000
    ExpiresByType application/vnd.oasis.opendocument.graphics A31536000
    ExpiresByType application/vnd.oasis.opendocument.presentation A31536000
    ExpiresByType application/vnd.oasis.opendocument.spreadsheet A31536000
    ExpiresByType application/vnd.oasis.opendocument.text A31536000
    ExpiresByType audio/ogg A31536000
    ExpiresByType application/pdf A31536000
    ExpiresByType image/png A31536000
    ExpiresByType application/vnd.ms-powerpoint A31536000
    ExpiresByType audio/x-realaudio A31536000
    ExpiresByType image/svg+xml A31536000
    ExpiresByType application/x-shockwave-flash A31536000
    ExpiresByType application/x-tar A31536000
    ExpiresByType image/tiff A31536000
    ExpiresByType application/x-font-ttf A31536000
    ExpiresByType application/vnd.ms-opentype A31536000
    ExpiresByType audio/wav A31536000
    ExpiresByType audio/wma A31536000
    ExpiresByType application/vnd.ms-write A31536000
    ExpiresByType application/font-woff A31536000
    ExpiresByType application/vnd.ms-excel A31536000
    ExpiresByType application/zip A31536000
</IfModule>
<IfModule mod_deflate.c>

SETTINGS I USE

Browser Cache – General Settings
 •Enable “set Last-Modified header”
 •Enable “set expires header”
 •Enable “set cache control header”
 •Disable “Set entity tag (eTag)”
 •Enable “set W3 Total Cache header”
 •Enable “HTTP (gzip) compression”
 •Disable “Prevent caching of objects after settings change”
 •Disable “Do not process 404 errors”

Browser Cache – CSS & JS
 •Enable “set Last-Modified header”
 •Enable “Set expires header”
 •Expires header lifetime – 31536000 seconds (1 year)
 •Enable “Set cache control header”
 •Cache Control Policy: cache with max-age
 •Disable “set entity tag (eTag)”
 •Enable “Set W3 Total Cache header”
 •Enable “HTTP (gzip) compression”

Browser Cache – HTML and XML
 •Enable “Set Last-Modified header”
 •Enable “Set expires header”
 •Expires header lifetime – 3600 seconds (1 hour)
 •Enable “Set cache control header”
 •Cache Control Policy: cache with max-age
 •Disable “Set entity tag (eTag)”
 •Enable “Set W3 Total Cache header”
 •Enable “HTTP (gzip) compression”

Browser Cache – Media and other files
 •Enable “Set Last-Modified header”
 •Enable “Set expires header”
 •Expires header lifetime – 31536000 seconds (1 year)
 •Enable “Set cache control header”
 •Cache Control Policy – cache with max-age
 •Disable “Set the entity tag (eTag)”
 •Enable “Set W3 Total Cache header”
 •Enable HTTP (gzip) compression

https://wordpress.org/plugins/w3-total-cache/