title: Getting Permission Denied response from _request() call
body: <p>I recently started getting a 'Permission Denied' response from our vimeo album.  Everything was working correctly and nothing has changed on the application.  Also, I checked and it appears no permissions have changed on the album or included videos in terms of permissions.  However, we did change the servers we're hosting our main site on, which resulted in a change of IP addresses but the site URL did not change.  </p>
  
  <p>Is it possible that the IP change somehow messed up the request we make to vimeo?  I looked in the admin settings on vimeo and didn't see anywhere we needed to specify IP addresses.  </p>
  
  <p>Basically, we're doing the following:</p>
  
  <pre><code>$vimeo = new phpVimeo(CONSUMER_KEY, CONSUMER_SECRET);
  $vimeo-&gt;setToken(OAUTH_TOKEN,OAUTH_TOKEN_SECRET);
  
  // **** GET THE VID DATA FROM VIMEO **** // 
  $result = $vimeo-&gt;call('vimeo.albums.getVideos', array('album_id' =&gt; xxxxxxxx,full_response =&gt; '1'));
  $videos = $result-&gt;videos-&gt;video;
  </code></pre>
  
  <p>And, as I said, this was working great for a while. Any ideas on what may have happened?  Thanks!</p>