You clicked on a link in Blackboard to view a CASK lesson, but instead you arrive at a page or login screen of www.medicaleducation.nl (www.medischonderwijs.nl) or of www.boerhaavenet.nl .

If you click on a link in Blackboard to start up CASK the following happens behind the scenes:
The call is transmitted:
www.blackboard.leidenuniv.nl > www.medischonderwijs.nl > www.boerhaavenet.nl (CASK is hosted on the last mentioned site)

Your log-in credentials will be passed along this route. Additionally, Boerhaavenet will check if the call indeed originated from www.medischonderwijs.nl. If a technique on any of these intermediate sites does not function or transmission of data is interfered, you will get stuck on one of these sites, or you will be presented with a log-in screen on one of these sites. The most usual cause of these problems are security settings in your browser preventing techniques to work. Setting your security settings less restrictive usually solves the problem.