WebBrowserTask fails to open .doc

I'm trying to open a document hosted in dropbox public folder.开发者_如何转开发 I'm able to open same document from IE. But when i try to do same, my program does nothing. Same program works fine with pdf hosted at same place. In case of pdf, browsertask launches pdf reader(app i installed). Here is the code i use:

WebBrowserTask webBrowserTask = new WebBrowserTask();
webBrowserTask.Uri = new Uri("http://dl.dropbox.com/u/1967630/new.doc", UriKind.Absolute);            
webBrowserTask.Show();

And in case of any problem, how do i handle "failed to navigate" kind of case?

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It works fine for me for both Emulator and Device on mango.

However, if you are on NoDo, you must do the code like this:

WebBrowserTask webBrowserTask = new WebBrowserTask();
webBrowserTask.URL = "http://dl.dropbox.com/u/1967630/new.doc";            
webBrowserTask.Show();