The content of the .htaccess file is:
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteRule -cat-(\d+)(/(\d+))?$ category.php?id=$1&page=$3 [NC,L]
RewriteRule -item-(\d+)$ item.php?id=$1 [NC,L]
RewriteRule -page-(\d+)$ page.php?id=$1 [NC,L]
RewriteRule ^feed.xml$ index.php?action=feed [NC,L]
RewriteRule ^sitemap.xml$ index.php?action=sitemap [NC,L]
RewriteRule ^contact.html$ index.php?action=contact [NC,L]
ErrorDocument 404 index.php?action=errorPage&code=404
ErrorDocument 500 index.php?action=errorPage&code=500
# RewriteCond %{REQUEST_FILENAME} !-f
# RewriteCond %{REQUEST_FILENAME} !-d
# RewriteRule . /index.php [L]
</IfModule>
If you still have problems, please reply this topic.