Can't make it work/start

[L_i_v_e]

I have a raspi 2 latest raspbian build, all upgraded, i tried with the automatic installation and it did not worked, there was only an empty folder, i tried with the manual one and it downloaded the files but i does not work. With npm install says npm: command not found, with node serveronly says:
module.js:340
throw err;
^
Error: Cannot find module ‘express’
at Function.module._resolveFilename (module.js:338:15)

and so on with these module: 280:25 364:17 380:17 8:15 456:26 474:10 356:32 312:12 and 364:17

What should i do? thanks

[L_i_v_e]

FIXED
the issue was in the node packet. By downloading out of the installer i solved the issue