My Norton toolbar have problem with a site oth IE and firefox

Hello ,

i use NIS 2012 latest version and latest update .

Also i use IE 9.0 and firefox with latest version .

but interesting , becuase when norton toolbar is active and when i virit this site : " https://www.ddn.ir:8443/login.php3 "

 

sudenlly closed my browsers ( both  ie and firefox ) .

 

and when i disable addon norton on my browsers , i can visit and open this site without problem .

 

Could you please help me , why my norton toolbar have problem with shi site ?

 

Thank you

Best Regards ,