Problem with caching

[eluser]Bart v B[/eluser]
voila ..RTFM

Caching can be enabled on a per-page basis, and you can set the length of time that a page should remain cached before being refreshed. When a page is loaded for the first time, the cache file will be written to your application/cache folder. On subsequent page loads the cache file will be retrieved and sent to the requesting user's browser. If it has expired, it will be deleted and refreshed before being sent to the browser.

Note: The Benchmark tag is not cached so you can still view your page load speed when caching is enabled.

What is your problem? everything you need to know is written..