Blanck front page

I have installed drupal 4.7 beta5.

To separated the login page and the main page i used section module.
so first page is:
theme 1
only login block

Second page is:
theme 2
all content

This works perfectly. I can login on theme 1, en the page opens in theme 2.

When i am logged in. The url is www.my-site.com/drupal/?q=node/2
Node 2 is mij home page text.

But when i change url to www.my-site.com/drupal/ the hole site gets messed up. The css file of theme1 is loaded, insted of css of theme 2.

Did some one face the same problems and found a solution?