externally connect to multisite generates redirect

Hi. I’m trying to access a multisite database outside wordpress, loading wp-config.php and wp-load.php. For doing so, I use include_once(path/wp-load.php), where the path was correctly defined. The method worked for a standard wordpress installation, so I know it is not a syntax error, but in multisite redirects automatically to the multisite main page.

I’m using a shared hosting account and the multisite wordpress is locaded in a folder. The main directory contains another wordpress “singlesite”, so the multisite wp-load file is something like root/folder/wp-load.php.

Can somebody explain why the redirects? I’ve tried this methond for another multisite, installed on a dedicated server, and worked like a charm. What can I do? Thank you in advance.