Open Internet Options from the Tools>>Internet Options menu.
Click the Security tab and select the Trusted Sites zone.
Click Sites.
Type in, or change the current entry in the "Add this website to the zone:" box to *.ruekert-mielke.com.
Ensure that the checkbox for "Require server verification (https:) for all sites in this zone" is NOT checked.
Click Add.
Click Close.
Click OK.