redirect after login not working

It is caused by a little issue.
Fix using redirect_to instead of redirect in lines 165 and 167:

if(strpos($loginLink, '?')) {
				$loginLink .= '&redirect_to='.urlencode($_SERVER['REQUEST_URI']);
			} else {
				$loginLink .= '?redirect_to='.urlencode($_SERVER['REQUEST_URI']);
			}

http://wordpress.org/extend/plugins/wp-private/