I received a hint to set a cookie domai in config.php to log in to www.page.com and page.com at the same time.
That does work very well. But, when i log out the logout does only work for one of both .
Is that a bug or my hosting or what could it be ???
Edit 1
Tryinng to do so on the demo page does not work as
http://www.demo.question2answer.org/
shows a not found error.