[xwiki-users] Include macro permission issue though page is accessible

Hi all, I have a strange issue on XWiki 6.3 (Windows Server 2003 R2, Apache 2.4, MySQL 5, Tomcat 7). On a subwiki main page I added the include macro to display the contents of a page on the main wiki (an info box that should appear on all subwikis). The macro works logged in as the admin user but normal users (authenticated from LDAP) get a permission issue: "Current user [xwiki:XWiki.USERNAME] doesn't have view rights on document [XWiki:Main.Info in allen Wikis]" I have the same include macro on the main wiki main page and there it works for all users. The user can also access the page referenced in the macro. Only on the subwiki it doesn't work. Permissions are set correctly though and everything else works. Hope someone can lead me in the right direction. Thanks in advance, Dennis