[TYPO3-english] ig_ldap_sso_auth issue

[Hebus.JD]

Hi,
I'm new on typo3, and I have to CASify a typo3.
I'm using Typo3 4.3.7, a CAS server 3.4.3 along with an Active Directory 
2003, and the quickstart site provided with the typo3 installer for my 
tests.
I followed the tutorial on 
http://xavier.perseguers.ch/tutoriels/typo3/articles/ldapactive-directory.html, 
and I manage to acces to my CAS server, but there are somes issues :

-When I'm accessing to the login page (on the bigfeet site), I type any 
login and password (even wrong ones) and I'm redirected to my CAS server 
where I have to type a valid login to get back to my site authenticated. 
Is there a way to go through the CAS Server in a transparent way?

-When I'm clicking on the logout button, I'm redirected to the CAS 
Server (with an address like 
http://localhost:8081/cas/logout?service=http://localhost:8503/index.php?id=19) 
but it doesn't go back to the site.

Any thought?

Thanks by advance.