set credentials of twitterstream in spring XD (Error Twitter authentication failed: 401 Authorization Required)

I'm trying to follow this tutorial http://ift.tt/1vuczDm

and I'm facing a problem in twitter connection.

I've set the keys in twitterstream.properties

consumerKey=**

consumerSecret=**

accessToken=**

accessTokenSecret=**

and when I try to start streaming

  stream create tweet --definition "twitterstream | log" --deploy 

this error appear:

Twitter authentication failed: 401 Authorization Required

any suggestions?