Fragment caches not being expired

I am having some serious issues with caching :frowning:

The latest problem that I have is the fragments are not being deleted.

Here is the haml code within the application.html.haml file that caches the text just fine - cache(:controller => "layout", :action => "header", :id => do      #header_links           ...

Here is the code that was originally placed within a sweeper file, then moved directly into the controller when trying ti figure out where the issue was

expire_fragment(:controller => "layout", :action => "header", :id => @account_id)

Unfortunately, it doesn't delete the cached data. I don't know if the issue is due to the fact that I am using subdomains or not. The cached data exists in tmp/cache/some_subdomain.localhost.3000/layout/header/2.cache

Any help is appreciated.