Npm is definitely not working

Npm is definitely not working

Every time I try to do something with NPM it doesn't work. I have node
installed with the version 0.10.7 and npm with version 1.2.21. I need to
install coffee-script and it gives me this error:
npm http GET https://registry.npmjs.org/coffee-script
npm http GET https://registry.npmjs.org/coffee-script
npm http GET https://registry.npmjs.org/coffee-script
npm ERR! network tunneling socket could not be established,
cause=getaddrinfo ENOTFOUND
npm ERR! network This is most likely not a problem with npm itself
npm ERR! network and is related to network connectivity.
npm ERR! network In most cases you are behind a proxy or have bad network
settings.
npm ERR! network
npm ERR! network If you are behind a proxy, please make sure that the
npm ERR! network 'proxy' config is set properly. See: 'npm help config'
npm ERR! System Linux 3.5.0-39-generic
npm ERR! command "/usr/local/bin/node" "/usr/local/bin/npm" "install" "-g"
"coffee-script"
npm ERR! cwd /home/sasuke/Videos/Node.js/Ex_Files_Node.js_FL/Exercise
Files/3 Modules
npm ERR! node -v v0.10.18
npm ERR! npm -v 1.3.8
npm ERR! code ECONNRESET
npm ERR!
npm ERR! Additional logging details can be found in:
npm ERR! /home/sasuke/Videos/Node.js/Ex_Files_Node.js_FL/Exercise
Files/3 Modules/npm-debug.log
npm ERR! not ok code 0
I've saw this link: https://github.com/isaacs/npm/issues/2677 But after I
tried to check the proxies I got this:
~ > npm config get proxy
proxy-url:port
~ > npm config get https-proxy
proxy-url:port
Later on that post someone said to change the token at
/usr/local/etc/npmrc But I don't have that file. After that I've update
node to v0.10.18 but I still have the same error. I am working on Ubuntu
12.04 and I still have no idea how to fix this. Please help.