[xwiki-users] Admin password for XEM 1.0-M2

Hi, I've installed XEM 1.0-M2 from a fresh install (new database...) and imported the xwiki-enterprise-manager-wiki-administrator-1.0-M2.xarfile. In the import list, I can see that there is an 'Admin' user, but I cannot log on with the password 'admin' (lower case 'a'). Is the Admin password different with XEM ? What am I doing wrong ? Antonio