as suggested in other posts, probably you don't have any user defined. it's not advisable to manually edit the configuration files. you should use the add-user (.sh or .cmd) utility as explained in https://access.redhat.com/documentation/en-US/JBoss_Enterprise_Application_Platform/6/html/Installation_Guide/chap-Getting_Started_with_JBoss_Enterprise_Application_Platform_6.html#Add_the_Initial_User_for_the_Management_Interfaces