Ultimate SEO URL redirects store to non-www (rest of site is www)

[gdubs12345]

My entire site is on www urls, but the oscommerce store with Ultimate seo urls, is redirected to non-www urls. The store pages arent ranking well compared to the rest of the site (forum/blog). I thought the problem might be because the store is on non-www urls.

 

Any tips on changing the htaccess, so it redirects to the www urls?

 

I tried adding he code below to my htacess, but the urls came out wrong:

 

RewriteCond %{HTTP_HOST} ^mysite\.com$ [NC]

RewriteRule ^(.*) http://www.mysite.com/$1 [QSA,L,R=301]

 

 

i would appreciate any help

thanks