title: npm module installed but not available?
body: <p>I implemented a npm module (called wrench) in an application which I always tested locally. That worked always without problems. Then I was trying to install wrench on my server.</p>
  
  <p><code>npm install wrench</code> did work as expected but as soon as it comes to <code>require("wrench")</code>, I get the following error:</p>
  
  <pre><code>&gt; require("wrench")
  Error: Cannot find module 'wrench'
      at Function._resolveFilename (module.js:320:11)
      at Function._load (module.js:266:25)
      at require (module.js:348:19)
      at [object Context]:1:1
      at Interface.&lt;anonymous&gt; (repl.js:171:22)
      at Interface.emit (events.js:64:17)
      at Interface._onLine (readline.js:153:10)
      at Interface._line (readline.js:408:8)
      at Interface._ttyWrite (readline.js:585:14)
      at ReadStream.&lt;anonymous&gt; (readline.js:73:12)
  </code></pre>
  
  <p>If I run <code>npm ls</code> I can see</p>
  
  <pre><code>wrench@0.1.0
  </code></pre>
  
  <p>Is there something I am missing here?</p>
  
  <p>Thanks,</p>
  
  <p>Elias</p>