Web Attack: Malicious Toolkit Website 9

I use Symantec Endpoint protection and I own http://www.vayumedia.com .

 

I had a few of my website's visitors tell me that they thought I had a virus on my website.  When I opened my website I recevied the Norton Pop Up: [SID 24089] Web Attack: Malicious Toolkit Website 9.  I receive it in Internet explorer sometimes and sometimes not.

 

I ran the URL thru:

 

Norton Safe Web:  Safe

AVG Tool: Safe

GoogleSafeBrowsing: Safe

UrlVoid.com: Safe

Online Link scan: safe

Dr. Web: Safe

 

We couldn't find anything on the website.  I am at a loss why Norton is reporting this.

 

What can I do to detect the issue and remove it from the website? Or is this a false reporting issue?