AJAX Username Checker returns "Session ha expired..."

Hello.

I have a problem with the AJAX username checker on my site's register form.
It returns the following error message :

Session expired or cookies are not enabled in your browser. Please press "reload page" in your browser, and enable cookies in your browser. Please refresh/reload page before filling-in

I have de-activated the SEF url rewrite option, which has fixed the problem.
But I would like to use the url rewrite option.

I've read here , that this issue could fixed by deactivating the "Enable anti-spoofing sessions checks" option in the "CB > Configuration > Integration" tab.

I've set this field to "No", but the problem is not fixed.

Does anyone know how to fix this ?

Thanks in advance for your help.

plastic1st

CB version : 1.9

Can you replicate the issue on a clean Joomla/CB install?
With core Joomla SEF?

I cannot.

Hello Nant.
Thanks for your answer and sorry for the long time before answering...

I've performed the test on another joomla install, and cannot reproduce the issue :S

I've tried to switch on the debug mode, in order to find where the error comes from, but in debug mode, the issue does not occur :blink:

What can I do to fix this problem ?
Thanks in advance for your help.

plastic1st