[Need Help] AJAX QUICK CHECKOUT LITE VERSION stucked

hi guys..
i'm newbie to opencart, but i love it very much for many reason..

i have a big problem for my site's checkout, i plan to make my checkout become more faster and efficient for my customer, that's why try to seach extension, and finally i download a module from opencart extension, AJAX QUICK CHECKOUT lite version
this is the link http://www.opencart.com/index.php?route ... n_id=15580

after i download it, i follow the way to upload the files, i make sure to make no mistake in uploading. after finish, i open the admin panel, and enable the extension, replace the main checkout..but the checkout in my site just stay THE SAME, it doesn't change to the AJAX CHECKOUT...

Can someone help me solve this problem?? i will really appreciate for the help..

Hi! I have the same problem here. Did you manage to make it work? Anyone? Thanks!

it would be best to contact the developer for assistance. They do not check the forums here