Express module not found when installed with NPM

Question

When I try to run the app.js file created by express, I get the following error:

$ node app.js

node.js:134
        throw e; // process.nextTick error, or 'error' event on first tick
        ^
Error: Cannot find module 'express'
    at Function._resolveFilename (module.js:320:11)

When I type in express --version I get a return statement of 2.3.3. I used npm to install express. I had to manually make npm using these instructions:

git clone http://github.com/isaacs/npm.git
cd npm
sudo make install

The error is Error: Cannot find module 'express'.

Do I need to do something after installing npm and express in order to make express see the modules created by npm?

• My node is version: 0.4.6
• My express is version: 2.3.3
• My npm is version: 1.0.6

Express is installed globally. I used the -g flag to install it.

---

Edit: When I try "node -e require.paths" I get:

[ '/home/user/.node_modules',
  '/home/user/.node_libraries',
  '/usr/local/lib/node' ]

So, node isn't detecting the npm installation. How do I get node to detect the npm installation?