Titanium Webview iOS not display Yahoo confirm SMS Security

I try to develop an Application using Yahoo SDK. When App show a webview with url :

https://api.login.yahoo.com/oauth/v2/request_auth?oauth_token=....

Then I input my username and account to login. Then webview displays Confirm SMS security view. But the webview do not display the "verify" button, like the Image below:


I set following properties to my webview

var YahooWebView = Ti.UI.createWebView({
        left : 0,
        top : 0,
        right : 0,
        bottom : 0,
        width : 320,
        height : 568,
        scalesPageToFit : true,
        url : "http://example.com"
    });

Thanks.