Permalinks and static html conflict

hi,
I have a problem while using permalinks and html static page.

For example, my permalinks are set so a post looks like: http://sitename.com/2006/07/12-postname.html (/%year%/%monthnum%/%day%-%postname%.html)

while cleaning my blog, I decided to remove some posts from the wp post list (so I deleted the post) without removing it from my site because of SEO issue. So I saved the page as .html, put it in the 2006/07/ directory.

The issue is that as soon as I created the directory and put the file in it, wordpress started showing me Directory index instead of year archive or month archive.

The address are:
Static HTML page:
http://www.ameriquebec.net/2006/07/06-je-suis-parti-en-voyage-pour-lete.html

Now it shows directory index instead of blog archive when going to
http://www.ameriquebec.net/2006/07/ or
http://www.ameriquebec.net/2006/

Now, i want to show blog archive, as it should show, like on http://www.ameriquebec.net/2008/, but I want to keep the static html pages..

Somebody here had the same issue?