No reservation is confirmed for registered users

[clerik777]

Good day! There is a problem:

  When ordering a guest, fill in all fields click confirm order and I receive a page with my data and temporary login and password.

But if you registered and logged in, then after clicking "confirm order" says that the page was not found (error http 500)!???
  While in the admin, order it appears! It all started after upgrading from 2.0.6 to 2.0.8e (version joomla - 2.5.6)

  And Taka problem: I do not get letters that made ​​the order at the store. (though the user is sent an email order confirmation)