Problem with tabbed form and container

Hello,
I try to create a tabbed form.
I saw these "How can I build a tabbed form?" in the FAQs, but in my "Advanced Elements" i can not find the container element. The Joomla-Version is 2.5.4 and ChronoForms is 4.0 RC3.21.
Thanks for your help.
Jörg

[attachment=1]Bildschirmfoto 2012-12-28 um 18.39.01.png[/attachment]

[attachment=0]Bildschirmfoto 2012-12-28 um 18.39.09.png[/attachment]

Hi Jörg,

The current release of ChronoForms is CFv4 RC3.5.2, please upgrade to get the latest features.

Bob

Thank you.
Its working fine.