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Hi there I would recommend looking into your canonical tags to point to http://signup.directiq.com/, as well as the parameter opportunities in Google Webmaster Tools. You are also able to block paramaters in your robots.txt, but I would be extremely careful doing so. Hope this helps! Good luck!

If it's that you have both www & non-www versions of your site, you need to do this through the .htaccess file. Have a look at this page for some info on how to create a bit of code to add in there. This link is assuming you want the www version of the site to be the one you use. http://dense13.com/blog/2008/02/27/redirecting-non-www-to-www-with-htaccess/ -Andy