[Plugin: W3 Total Cache] gzip isn’t working when using w3 total cache

Hello,

Currently using the dev version of W3 Total Cache YSlow is giving me the following errors:

Grade C on Compress components with gzip
There are 2 plain text components that should be sent compressed

http://24design.net/
http://cdn.24design.net/wp-content/themes/twentyten/style.css

I’ve tried adding

# BEGIN HTTP Compression
<IfModule mod_deflate.c>
# Netscape 4.x has some problems...
BrowserMatch ^Mozilla/4 gzip-only-text/html
# Netscape 4.06-4.08 have some more problems
BrowserMatch ^Mozilla/4\.0[678] no-gzip
# MSIE masquerades as Netscape, but it is fine
BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
# NOTE: Due to a bug in mod_setenvif up to Apache 2.0.48
# the above regex won't work. You can use the following
# workaround to get the desired effect:
BrowserMatch \bMSI[E] !no-gzip !gzip-only-text/html
# Don't compress media or scripts
SetEnvIfNoCase Request_URI (?:bmp|gif|jpe?g|php|png|swf|tiff?)$ no-gzip dont-vary
# Make sure proxies don't deliver the wrong content
Header append Vary User-Agent env=!dont-vary
# Fragment size to be compressed at one time by zlib
#DeflateBufferSize 4096
# Amount of compression applied to output
#DeflateCompressionLevel 9
# How much memory should be used by zlib for compression
#DeflateMemLevel 9
# Zlib compression window size
#DeflateWindowSize 15
# Enable HTTP Compression policy for all except .css, .js and .html documents
SetOutputFilter DEFLATE
AddOutputFilterByType DEFLATE text/css text/plain text/html text/xml text/xsd text/xsl application/x-javascript \
\. application/wlwmanifest+xml image/svg+xml image/x-icon
</IfModule>
# END HTTP Compression

from the wp-content/plugins/w3-total-cache/ini/_htaccess file to my root .htaccess file, but without any improvements.

Could someone tell if I might be overlooking something somewhere perhaps?