yiic command strange behavior

[mbischof]

using the following config, after entering yiic help, there is some action in the background, but no output

'modules' => array(
        'webshell' => array(
            'class' => 'application.modules.webshell.WebShellModule',
            'exitUrl' => '/',
            'useYiic' => true,
            'yiicCommandMap' => array(
                'migrate' => array(
                    'class' => 'system.cli.commands.MigrateCommand',
                    'interactive' => false,
                ),
            )
        )
    ),