How Do I Remove " Reported Attack Page" Error?

How do i remove this error from my site?
This is an ad that I inserted!
Reported Attack Page!
This web page at www.chicagoexpresslimo.com has been reported as an attack page and has been blocked based on your security preferences.

Attack pages try to install programs that steal private information, use your computer to attack others, or damage your system.Some attack pages intentionally distribute harmful software, but many are compromised without the knowledge or permission of their owners.

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