file template not work

{
    "shell_input":true,
    "file_templates": {
        "js": [
            "Packages/User/MyTmpl/js.sublime-snippet"
        ],
        "py": [
            "Packages/User/MyTmpl/python.sublime-snippet"
        ]
    }
}

create  new file by ⌥ +⌘+N, not use snippet.
