Step 1 - Go to the "Web" section and click "Microsoft Frontpage" icon.
(see screenshot)

Step 2 - Click on the "Microsoft Frontpage Administration Interface" to access the frontpage manager. You can also change the password, uninstall/install the frontpage extension and repair them in case of problem.
(see screenshot)

IMPORTANT: If you want to use customer error page then you should uninstall the frontpage extensions!
Please make sure that you are viewing the screenshots in their
original sizes as there is possibility that your browser is resizing
the images!!!

If you have more question regards this matter, please contact our
support team