From your Admin page go to Tools > Layout Boxes Controller and see if the two new boxes have been activated to show where you want them (left/right, up/down). The two boxes are named: shopping_cart_with_rewards.php and reward_points.php.

If the mod is installed correctly, they should be there waiting to be defined. Good luck and let us know if that was the reason you couldn't see them. Just a note: the shopping_cart_with_rewards.php side box replaces the normal shopping cart box and shows the reward points in the cart until an order is confirmed.