Statuses Update


Hi All, I’m stucked trying to make a status update using the api.
This is my situation, maybe anyone can help me with this.
I created an W8 (xml+c#) app that first get auth token, and then have to make a post to twitter.
The token request works fine, but I’m getting a 401 error when make the request to
The weird thing here is that, if I make the cURL request with the headers and status that I’m generatin inside my app, the request is ok, I’m able to update my status, but get a 401 throw my app.
Any ideas?