Where is the Boost cached files? I use Drupal 7.9 and Boost 7.x-1.x-dev

Last month i disabled Boost. I used only core caching with the all options are enabled.
And min cache 6 hours, max cache 1 day.

Then without chancing core cache settings i enabled Boost module.
I didn't change any setting.
- Cache specific pages: All pages
- Cache HTML output, usually a webpage of type text/html: Enabled, 6 hours, 1 day
- Root cache directory: cache
- Normal cache directory: normal

But the "html" files aren't saved to my public html folder.
I have this folder:
"/public_html/cache/normal/www.example.com"

But this folder only has a ".htaccess" file.

I get 25 hits in one hour, but there is no html file inside these folders.

What would be the problem.
Thank you for help.
cache/normal/www.example.com is indeed where Boost would store your cached files. 

Have you added the proper Boost directives to your public_html/.htaccess? It sometimes takes a bit of fiddling to get them right - you need to experiment by accessing the site as an anonymous user and viewing source on the returned page to see if the Boost signature is in there.