Pop-ups always have to be allowed. You may adjust the settings as follows:


Settings for Internet Explorer

  1. Open the Extras in the Explorer Menu
  2. Click on Internet options
  3. Click on Security
  4. Deactivate the control case  Block pop-ups
  5. Finish the Settings with a click on OK


For Firefox you may change the Settings in the menu Extras / Settings / Contents 


Please verify the settings of your pop-up blocker after each update of the browser.