how to access a file anonymously via the api?

Hi!

The below code works (when using a BasicClient):

router.get('/testBox', function(req, res) {
    console.log("testbox");
    // Create a basic API client 
    var client = sdk.getBasicClient('pEsQejhEGEHH53r5muOhQkCquNBj8ddl');

    client.files.get('***number removed for privacy***463', null, function(err, data) {
        console.log("file:");
        console.log(JSON.stringify(data));
        console.log("err:" + err);

    });
    res.end("testbox");
});

but trying the same thing with an AnonymousClient (the file is public btw) doesn't work:

router.get('/testAnon', function(req, res) {
    console.log("testAnon");
    // Create a basic API client 
    var client = sdk.getAnonymousClient();

    client.files.get('***number removed for privacy***463', null, function(err, data) {
        console.log("file:");
        console.log(JSON.stringify(data));
        console.log("err:" + err);

    });
    res.end("testAnon");
});

does NOT work. I have searched the forum and can't find anything that help, any suggestions?

Thank you!

Mark