我在.htaccess文件中有以下代码，但它对我不起作用：
## EXPIRES CACHING ##
<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType images/jpg "access 1 year"
ExpiresByType images/jpeg "access 1 year"
ExpiresByType images/gif "access 1 year"
ExpiresByType images/png "access 1 year"
ExpiresByType text/css "access 1 month"
ExpiresByType text/html "access 1 month"
ExpiresByType application/pdf "access 1 month"
ExpiresByType text/x-javascript "access 1 month"
ExpiresByType application/x-shockwave-flash "access 1 month"
ExpiresByType images/x-icon "access 1 year"
ExpiresDefault "access 1 month"
</IfModule>
<ifModule mod_deflate.c>
<filesMatch "\.(js|css|html|php)$">
SetOutputFilter DEFLATE
</filesMatch>
</ifModule>
请告诉我我在这里做错了什么？