Trying to create a new security realm

JBOSS EAP 6.3 Red Hat Enterprise Linux 6

Trying to create a new security realm using the following commands in the management console: /host=master/core-service=management/securityrealm= ManagementRealmHTTPS/:add /host=master/core-service=management/securityrealm= ManagementRealmHTTPS/authentication=properties/:add(path=Man agementUsers.properties, relative-to=jboss.domain.config.dir)

But I keep getting the following errors: { "outcome" => "failed", "failure-description" => "JBAS014883: No resource definition is registered for address [ (\"host\" => \"master\"), (\"core-service\" => \"management\", (\"security-real\" => \"ManagementRealmHTTPS\") ]", "rolled-back" => true }

Any ideas what might be causing this error?