Page Duplication Issue SEO URL Structore

Hi Opencart Theam,

I am suing opencart CMS. I have an issue in SEO link structure customization. I want to create a unique url of category/product

For Example: ensdresses.com/category/product link: http://ensdresses.com/Casual-Dresses/indian-frock

I have successfully rewrite URL's http://ensdresses.com/Casual-Dresses/indian-frock

but know problem is that when i directly go to the product page e.g indian-frock from home page.

it show URL like this http://ensdresses.com/indian-frock instead of http://ensdresses.com/Casual-Dresses/indian-frock

You may checkout by visiting site.

It creates duplicate pages of same product.

Can any one please tell me how to resolve this issue.

Thanks

Simply Enable the SEO urls and change the .htaccess