[xwiki-users] No extension found, unsupported repository type and JAXB conflict

Hi XWikiers, I just installed a XWiki Enterprise 5.2 using the exe installer on my windows laptop. I then connected successfully as Admin and tried to install extensions using the Extension Manager. But the answers to my queries are always : "no extensions found". In the XWiki command window, I found theses lines : 2013-11-03 00:00:37,459 [main] ERROR aultExtensionRepositoryManager - Failed to add repository [extensions.xwiki.org ( http://extensions.xwiki.org/xwiki/rest/)] org.xwiki.extension.repository.ExtensionRepositoryException: Unsupported reposit ory type [xwiki] at org.xwiki.extension.repository.internal.DefaultExtensionRepositoryMan ager.addRepository(DefaultExtensionRepositoryManager.java:128) ~[xwiki-commons-e xtension-api-5.2.jar:na] ............. Caused by: org.xwiki.component.manager.ComponentLookupException: Failed to looku p component [org.xwiki.extension.repository.xwiki.internal.XWikiExtensionReposit oryFactory] identified by [role = [interface org.xwiki.extension.repository.Exte nsionRepositoryFactory] hint = [xwiki]] at org.xwiki.component.embed.EmbeddableComponentManager.getComponentInst ance(EmbeddableComponentManager.java:349) [xwiki-commons-legacy-component-defaul t-5.2.jar:na] .............. Caused by: java.lang.LinkageError: JAXB 2.0 API is being loaded from the bootstr ap classloader, but this RI (from jar:file:/C:/tools/XWikiEnterprise5.2/webapps/ xwiki/WEB-INF/lib/jaxb-impl-2.1.12.jar!/com/sun/xml/bind/v2/model/impl/ModelBuil der.class) needs 2.1 API. Use the endorsed directory mechanism to place jaxb-api .jar in the bootstrap classloader. (See http://java.sun.com/j2se/1.5.0/docs/guid e/standards/) I suppose it's caused by my old java 1.6 version, but it's supported ( http://platform.xwiki.org/xwiki/bin/view/AdminGuide/Installation#HPrerequis… ). Could someone confirm that I'm right ? Thank you. Maxime