Changed hosts file, doesn't work

I've changed my hosts file but it doesntwork. I tried to restart my pc and uncheck-check the tcpip v4 and v6 protocol for the network adapter, but still does't work. Disabled and enabled antivirus, but nothing. Here below the test i do at the cmd prompt.

C:\Windows\System32\drivers\etc>more hosts
127.0.0.1 myself

C:\Windows\System32\drivers\etc>ping myself
Impossibile trovare l'host myself. Verificare che il nome sia corretto e riprovare.

C:\Windows\System32\drivers\etc>