[xwiki-users] Create a new wiki error : CREATE DATABASE...

Hello I'm a new user of xwiki and i try to create a new wiki with the manager. But I have a problem... though I put in "Wiki identifier" field I have the following message : "A database with this identifier already exists" When I "force" creation, I have the following message in logs : 2008-12-31 15:42:20,357 [http://127.0.0.1:8080/xwiki/bin/view/WikiManager/CreateNewWiki?wikiname =test&forcewikiname=on&XWiki.XWikiServerClass_0_wikiprettyname=Test&XWik i.XWikiServerClass_0_description=&XWiki.XWikiServerClass_0_server=test.l ocaldomain.com&XWiki.XWikiServerClass_0_owner=XWiki.Admin&XWiki.XWikiSer verClass_0_owner=&readersgroups=xwiki%3AXWiki.XWikiAdminGroup&readersgro ups=xwiki%3AXWiki.XWikiAllGroup&writersgroups=xwiki%3AXWiki.XWikiAdminGr oup&adminsgroups=xwiki%3AXWiki.XWikiAdminGroup&stepbystep=0&doc=1&action create=Cr%E9er] [http-8080-1] WARN wikimanager.WikiManager - Wiki [test] creation failed: wiki database creation threw exception com.xpn.xwiki.XWikiException: Error number 3401 in 3: Exception while create wiki database test Wrapped Exception: ERROR: CREATE DATABASE cannot run inside a transaction block at com.xpn.xwiki.store.XWikiHibernateStore.createWiki(XWikiHibernateStore.j ava:243) at com.xpn.xwiki.store.XWikiCacheStore.createWiki(XWikiCacheStore.java:542) at com.xpn.xwiki.plugin.wikimanager.WikiManager.createWikiDatabase(WikiMana ger.java:610) at com.xpn.xwiki.plugin.wikimanager.WikiManager.createNewWiki(WikiManager.j ava:503) at com.xpn.xwiki.plugin.wikimanager.WikiManagerPluginApi.createNewWiki(Wiki ManagerPluginApi.java:192) ... Someone know how can I solv that??? Thanks for help