KCFinder Browser doesn't browse the files but shows my error page

Hello,
CONTEXT
I use CiviCRM 4.5.4 and DRUPAL 7.34. One database for Drupal and another database for CiviCRM.
My problem came just after the upgrade to 4.5.4.
I precise also that my website is ssl secured so all the links are https://www.mywebsite.com/...
BUG DESCRIPTION
I create a new message for a contact.
Then I click on the icon in the text editor to add a media.
I can type a path or browse my server.
If I choose to browse the pop up window doesn't show me the browser but my default error page
If I write directly the path, it works but that's not what I want to do.

NOTE :
The problem is the same with TinyMCE or CKEditor

I hope my description is OK