title: nodejs steam trade offer manager not polling
body: <p>everything else is working in my steam bot but <code>steam-tradeoffer-manager</code>.<br>
  <code>client</code> is my <code>steam-user</code> : <code>var client = new SteamUser();</code></p>
  
  <pre><code>var TradeOfferManager = require("steam-tradeoffer-manager");
  
  var manager = new TradeOfferManager({
      steam: client,
      language: "en",
      pollInterval: 10000,
      cancelTime: 300000
  })
  </code></pre>
  
  <p>Cookies and api key</p>
  
  <pre><code>client.on("webSession", function(sessionID, cookies) {
      manager.apiKey = webAPIKey;
      manager.setCookies(cookies, function() {
          console.log("Trade offer cookies set. Got API Key: " + manager.apiKey);
      })
  })
  </code></pre>
  
  <p>This doesn't work</p>
  
  <pre><code>manager.on('newOffer', function (offer) {
      console.log("New offer!");
  });
  </code></pre>
  
  <p>Bot works perfectly but doesn't detect new offers.  </p>
  
  <p>What am I doing wrong. I think the problem could be the polling?.  </p>
  
  <p>what have you done to get this to work?</p>