need help finding signature name to allow website on computer

hey guys, I'm having trouble accessing a website www.chandon.com to buy wine. I get the message IPS Detection Statistical Submission and An intrusion attempt by 65.61.140.175 was blocked with risk name HTTP Malicious Cookie Activity. I don't know what the signature name for this is so I can unblock it so I can buy some wine... any help or know how I can identify the signature name?