Joomla switches to mod_mogin on readon

Hello

Joomla 1.5.22 - last CB version

When user is not logged and is on an article with readon, there is a button "Register to read more..." with a link like http://.../.../index.php/component/user/login?return=...
When clicking on this link there is the Joomla login page showing up !
Conforming to installation process of CB I disabled this standard login module.
Why it is not the CB login module that is showing up ?
You can see this on ifets.xorion.fr

I was looking thru the CBforum but did not find the solution - Could it be that its a bug ?

Thanks

There is a redirect plugin on the JED that can be used.

see
extensions.joomla.org/extensions/access-a-security/authentication/1236
bye