How to install another script

Hi,

I’d wp installed on my root directory, and I want to install a link directory script into root/directorio path, everything seems to be ok, the url https://www.homepage.com/directorio is working properly but this directory script has an admin area at https://www.homepage.com/directorio/admin everytime I try to get into this admin area the browser shows the homepage of the wp script.

I’m newbie at this point so I cannot understand what is happening, I searched before posting ??

Thanx