I just tried to install this module,but all I get iss blank white page on the checkout...I mean it is not all blank, I have my header,sideboxes ,but the place in the middle of the page is just white...I do not know why is it so:-(Any idea on it?I use latest vesion of zen cart.what does "loading an extra_configures file called checkout.php before the filenames.php file" mean? I went through all 4 steps of Installation (Zen Cart 1.3.8+)...

hwen I was installing Install CSS JS Loader by Rubik Integration there was step 5:
Please note that this module contains the file “includes/templates/YOUR_TEMPLATE/common/html_header.php”, if you have a file in the same folder you may want to merge the content of the 2 files. (If you have been using Zencart's coding standards then more than likely you should not have this file here).

I had this html_header.php file there and did not merged them. could this be a reason?

Do we need to install previous sql update files from this module?Any help will be appreciated. this module...