friendly urls

[Nikita451]

Hello.
Friendly urls doesn't work correctly.

1. When I turn to a detailed review of the goods - access denied.
   can be corrected:
   try_files $uri $uri/ /index.php$uri&$args /index.php?q=$uri&$args;
   or
   try_files $uri $uri/ /index.php?q=$uri&$args;
   instead of
   try_files $uri $uri/ /index.php$uri&$args;
2. When I press button "Add to cart", The cart disappears.
3. When I press button "Order with an obligation ..." I get the page of the back office instead of
   inforamation about my order.