hi, JBW
Really appreciate your reply.
I have solved my problem. I just wanted to install the new version prestashop (my old one is 1.5.2) on my test environment.
Although I can not solve the problems I mentioned previously, CPanel is so great to have an application function of quick prestashop installation on the web hosting directly.
After installation, my main website had not been affected at all. Now I put the test shop in the maintenance mode and start to customize to what I need.
Thank you very much
Regards
Wei