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Off the top of my head, it sounds like a configuration problem with Apache. In httpd.conf (the Apache config file) is the only place where you can define custom server responses, that I know of. You may want to contact you hosting provider's Technical Support.
Hope this helps.
James
Insanity can be defined as "doing the same thing over and over and expecting different results."
Stupidity is not a crime. Therefore, you are free to go.