Page caching on hosted server not working

I added page caching to my rails application, the production server
was to write a cached version of the page but instead I get the
following error in my log files when I access
Errno::EACCES (Permission denied - ./public/about.html):

I’m using rails 2.2.2, I believe the phusion’s version is 2.06

I contacted my hosting provider, they say “the request you are trying
to make requires full permissions on our servers however we do not
offer the ability to setup full permissions on our servers for
security reasons.”

Has anyone ran into this problem, I’ve tried to research this as much
as I could, but I am struggling to find an answer.

Thank you for your time,