Can't install addons

I did an addon on localhost and when I upload it and install it display the settings and everything correctly in the admin page.

But the addon is not working at all, when I checked at /skins/basic/customer/addons it has not created the addon folder.

Everything works fine in localhost.

Both the /skins/basic/customer/addons and /skinsrepository in /var have 755 permission on all folder and files.

Thanks in advance.