First, go to Help/System Info to make sure you're running the PHP version you stated previously. More than once, others have thought they were running a later version, only to find it was PHP4.
If it still shows PHP 5.2, I would guess it's one of two things. Either another extension is causing problems with the operation or there is a script error. You can check for script errors using Firefox Firebug. The only other thing I can think of is to try disabling other non-CB-native plugins, modules and components to see what might be causing the conflict.
PS-Have you ran CB Tools, checked server error logs?
Post edited by: Rapunzl, at: 2009/12/04 04:32