.htaccess generating a 500 error status - .htaccess

Question

I'm trying to generate redirecting and caching with the .htaccess file.
Here's my Code:
RewriteEngine On
RewriteCond %{HTTP_HOST} !^www\.
RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L]
<ifModule mod_headers.c>
ExpiresActive On
ExpiresDefault A86400
<FilesMatch "\.(ico|gif|jpg|jpeg\png|flv|pdf|swf|mov|mp3|wmv|ppt)$">
ExpiresDefault A1814400
Header append Cache-Control "public"
</FilesMatch>
<FilesMatch "\.(xml|txt|html)$">
ExpiresDefault A259200
Header append Cache-Control "proxy-revalidate"
</FilesMatch>
<FilesMatch "\.(js|css)$>
ExpiresDefault A10800
Header append Cache-Control "proxy-revalidate"
</FilesMatch>
<FilesMatch "\.(php|cgi|pl)$">
ExpiresDefault A0
Header set Cache-Control "no-store, no-cache, must revalidate, max-age=0"
Header set Pragma "no-cache"
</FilesMatch>
</ifModule>
<ifModule mod_deflate.c>
<FilesMatch "\.(js|css|html|htm|php|xml)$">
SetOutputFilter DEFLATE
</FilesMatch>
</IfModule>
<FilesMatch "\.(ico|pdf|flv|jpg|jpeg|png|gif|js|css|swf)(\.gz)?$">
Header unset ETag
FileETag None
</FilesMatch>
If I remove all the caching, and leave only the first three lines, it works fine but without caching:
RewriteEngine On
RewriteCond %{HTTP_HOST} !^www\.
RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L]
What am I doing wrong?

Answer 1

"Regex could not be compiled"
<FilesMatch "\.(ico|gif|jpg|jpeg\png|flv|pdf|swf|mov|mp3|wmv|ppt)$">
You have a \p token (used to match Unicode code points and would seem to not be supported in Apache config?) - looks like a typo - it should be |p (pipe-p).
I did just try this on my own server (Apache 2.4) and got the same error.