Statuses Update Response API 1

HTTP/1.1 401 Unauthorized
cache-control: no-cache, max-age=300
content-length: 85
content-type: application/json; charset=utf-8
date: Sat, 25 May 2013 17:56:34 GMT
expires: Sat, 25 May 2013 18:01:34 GMT
server: tfe
set-cookie: _twitter_sess=BAh7CDoHaWQiJTBiNjA3M2YxZjZlMTZmZmZkNzNkOTlkODFmOWEwOTRmIgpm%250AbGFzaElDOidBY3Rpb25Db250cm9sbGVyOjpGbGFzaDo6Rmxhc2hIYXNoewAG%250AOgpAdXNlZHsAOg9jcmVhdGVkX2F0bCsITW3V3D4B--13518cc0ebcb614b22fbaa2edf2510f26b798290; domain=.twitter.com; path=/; HttpOnly
status: 401 Unauthorized
strict-transport-security: max-age=631138519
vary: Accept-Encoding
www-authenticate: OAuth realm="https://api.twitter.com"
x-frame-options: SAMEORIGIN
x-runtime: 0.01450
x-transaction: 8a6f5b8455247842
x-ua-compatible: IE=9,chrome=1

{"error":"Could not authenticate with OAuth.","request":"\/1\/statuses\/update.json"}