settings not saving, menu not displaying

1) under network admin settings, try to select ‘remote login’ checkbox and save. It does not stay selected.

2) User domain mapping page checked in network settings, but user menu item/page does not display on other dashboards

WP version 3.5.2
plugin Version 0.5.4.3

thanks,
elaine

http://ww.wp.xz.cn/plugins/wordpress-mu-domain-mapping/