my new tool is not showing tools list

[Joshua Ji]

Hi,

I searched first but no luck.

I needed one more editorial tool.

so I copied editorial and renamed folder to editorialhome.

also "Editorial.php" file to "Editorialhome.php" and the class name and few lines in it.

it works great on my test server.

install and displaying successfully.

but when I uploaded it on live server, it's not even showing up.

can't even install it...

I checked and changed file and directory permissions (chmod 777 -r) recursively, surely.

what or where should I start to check from?

Thank you so much in advance.