Activity Stream Stay Blank on xwiki

Hi all,

I use xwiki-enterprise-manager-mysql-2.6.zip and xwiki-enterprise-manager-wiki-administrator-2.6.xar for Xwiki Enterprise Manager.

I create a new wiki on Xwiki Enterprise Manager with name 'testwiki2'. I go to url http://testwiki2:8080/xwiki/bin/view/Main and I import xwiki-enterprise-wiki-2.6.xar (I test with xwiki-enterprise-wiki-2.6-20101209.005543-192.xar it's the same). I create a new space on testwiki2 with name 'Space_Test', it's create but the Activity Stream Stay Blank.
When I go on portail at http://localhost2:8080/xwiki/bin/view/Main I can see on 'recent modification' my space 'Space_Test'.

Ps: I test with xwiki-enterprise-manager-web-2.6.war and xwiki-enterprise-manager-wiki-administrator-2.6.xar On Tomcat 6.0.29 and MySQL-essential-5.1.53-win32 It's the same problem.

I test with xwiki-enterprise-web-2.6.war and xwiki-enterprise-wiki-2.6.xar i don't have problem. But I need to use XWiki Enterprise Manager for Manage Multiple wiki with the same user's database.