mongo works, MEAN stack doesn't work

melissa@simba:~/meeth-app$ mongo
MongoDB shell version: 2.6.11
connecting to: test
> ^C
bye
melissa@simba:~/meeth-app$ npm start

> meeth-app@0.0.0 start /home/melissa/meeth-app
> node ./bin/www


/home/melissa/meeth-app/node_modules/mongoose/node_modules/mongodb/lib/server.js:228
        process.nextTick(function() { throw err; })
                                            ^
Error: connect ECONNREFUSED
    at exports._errnoException (util.js:746:11)
    at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1010:19)

npm ERR! Linux 2.6.35.4-rscloud
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "start"
npm ERR! node v0.12.4
npm ERR! npm  v2.10.1
npm ERR! code ELIFECYCLE
npm ERR! meeth-app@0.0.0 start: `node ./bin/www`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the meeth-app@0.0.0 start script 'node ./bin/www'.
npm ERR! This is most likely a problem with the meeth-app package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     node ./bin/www
npm ERR! You can get their info via:
npm ERR!     npm owner ls meeth-app
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /home/melissa/meeth-app/npm-debug.log

I incorrectly put my machine's IP instead of localhost in the app.js line. So I changed it back to mongoose.connect('mongodb://localhost/meeth'); and the problem is fixed