.htaccess file & RewriteCond issue (trying to have direct to www.)

I am having an issue getting my wordpress site to load the www. version.

I have tried a 301 redirect directly in cpanel and manually in the htaccess file.

RewriteEngine On
RewriteCond %{HTTP_HOST} ^2012boss.com$
RewriteRule ^(.*)$ "http\:\/\/www\.2012boss\.com$1" [R=301,L]

I have edited my .htaccess file with a ton of different options that I have found online, trying to get it to automatically load the www. version so I don’t have duplicate entries on google as well to simplify things.

When ever I try any of these different methods I get an error stating:
“Firefox has detected that the server is redirecting the request for this address in a way that will never complete.”

I have browsed and searched on here and have not found a answer that solves this.

Thanks for help in advance,
Matt