This page has been off-line for a week, through no change by me! Suddenly it stopped working and produced a server error (500). Technical support suggested changing the settings to use PHP 5; How to do this? Go to the FAQ page on 1and1 and scripts and PHP; but make a long story short, copy this single line: AddType x-mapp-php5 .php into the .htaccess file; and, voilá, the page came back to life!
Note, the .htaccess file normally is hidden (since it starts with a “dot”. But it is visible to Fetch ( I use Fetch for ftp purposes.) In the Fetch window, I changed the file name temporarily removing the dot, downloaded the existing file, added the line, re-uploaded it, and then changed the name back again, adding the period.