Tweet jsOauth request_token

code:

var options = {
consumerKey: "myConsumerKey",
consumerSecret: "myConsumerSecret",
requestTokenUrl: "https://api.twitter.com/oauth/request_token",
authorizationUrl: "https://api.twitter.com/oauth/authorize",
accessTokenUrl: "https://api.twitter.com/oauth/access_token",
callbackUrl:"myCallbackUrl"
};

var requestParams;
var accessParams;
var oauth = OAuth(options);

oauth.get('https://api.twitter.com/oauth/request_token',
function (data) {

console.dir(data);

window.open('https://api.twitter.com/oauth/authorize?' + data.text);

requestParams = data.text

},
function (data) {
alert('darn');
console.dir(data)
});

problem: the response's properties is empty

how can I resolve the issue