To change permission in network shared folder.

I try to make permission to my network storage but it fails. This error command: C:\>CACLS \\192.168.2.205\Public\ /e /p Everyone:f The specified network name is no longer available. My fault is... I make permission using Windows 10 then after I downgrade my PC to Windows 7 because of my system only allowed Windows 7 to running the system. After the downgrade my Windows 7 PC can't allow to open network storage. What should I do? There is another alternative to set the permission? Help me please...