title: "Could not authenticate you." -error when using Twitter OAuth
body: <p>I'm building my first system using Twitters OAuth and have some issues.</p>
  
  <p>First, I'm using Abraham's Twitter-class for this and I have followed <a href="http://www.snipe.net/2009/07/writing-your-first-twitter-application-with-oauth/" rel="nofollow noreferrer">this</a> tutorial. However, I get these lines on my callback.php:</p>
  
  <pre><code>Warning: array_merge() [function.array-merge]: Argument #2 is not an array in C:\xampp\htdocs\twitter\twitterOAuth\OAuth.php on line 301
  
  Warning: strtoupper() expects parameter 1 to be string, array given in C:\xampp\htdocs\twitter\twitterOAuth\OAuth.php on line 373
  Oops - an error has occurred.
  SimpleXMLElement Object
  (
      [request] =&gt; /account/verify_credentials.xml
      [error] =&gt; Could not authenticate you.
  )
  </code></pre>
  
  <p>Is this problem by Twitter-class, or am I doing something wrong? I have my Consumer Key and Consumer Secret in config.php as tutorial says, but should I store something else?</p>
  
  <p>Martti Laine</p>